Dog health: infectious
Distemper in Dogs in India: Signs by Stage, Survival and the Nervous-System Phase
Canine distemper kills about one dog in two, and the phase owners never see coming arrives weeks after the dog seemed to get better. This page gives the signs stage by stage, what supportive care does and does not do, the vaccine schedule four authorities write differently, Indian prices from two government rate cards, and every Indian study we could open with its denominator and its population.
Quick answer
Distemper in dogs is a viral infection of the immune system, airways, gut and brain, and in India it is a disease of the unvaccinated puppy above all. It runs in three phases, a first fever three to six days after infection, a second fever with eye and nose discharge, vomiting and pneumonia, then nervous signs that can arrive weeks or months later, after the dog looked well again. A Jabalpur screening of 2,875 dogs found 92 percent of positive dogs unvaccinated.
This guide is general information for Indian pet owners and is not a diagnosis. Always consult a registered veterinarian near you before acting on anything you read here, and treat any sudden change in your pet's condition as urgent.
Signs of Canine distemper
The 11 signs to watch for are listed below. Any one of them is a reason to consult your nearby vet; none of them is a diagnosis.
- A first fever 3 to 6 days after infection, often missed entirely
- Watery then thick discharge from both eyes and both nostrils
- A second fever with lethargy and refusal of food
- Coughing, then laboured breathing as pneumonia sets in
- Vomiting and diarrhoea, sometimes bloody
- A few quiet days that look like recovery, then decline again
- Rhythmic twitching of a limb or the face that continues at rest
- Chewing movements of the jaw with drooling, the chewing-gum fit
- Circling, head tilt, wobbliness or seizures
- Thickened cracked footpads and nose, the hard pad
- Pitted, discoloured adult teeth in a dog infected as a puppy
Breeds on this site that document this condition
Canine distemper is an infection, not an inherited disease, so no breed is more or less susceptible to it and no screening scheme or registry anywhere in the world grades a breed for it. Age and vaccination status decide who gets it, and the Jabalpur screening found 68 percent of confirmed dogs were under 12 months and 92 percent were unvaccinated. Only two cards below carry a genuine within-breed figure, and both are labelled with exactly what they measure. Every other breed figure this site could reach measured vaccination uptake reported by a breed club rather than disease, and the Orthopedic Foundation for Animals statistics dump carries no distemper data at all, so no third card is invented here.
India has measured canine distemper at least six times with real denominators. A Jabalpur screening of 2,875 dogs found 1.19 percent positive by rapid test and 0.86 percent by RT-PCR, with 68 percent of confirmed dogs under 12 months and 92 percent unvaccinated. Eight years of Madras Veterinary College hospital data in Chennai gave 1,185 clinical diagnoses among 1,447 suspected cases, 81.89 percent, and found winter and the month of November more susceptible, which is the only Indian seasonal evidence that exists. Free-ranging dogs in Maharashtra carried antibody at above 72 percent of 219 sampled, and rural village seroprevalence reached 73 percent against a 34 percent vaccination coverage. In September 2018 canine distemper killed 28 Asiatic lions at Gir in two weeks and was detected in 68 lions and 6 leopards. India's Dog Breeding and Marketing Rules 2017 require annual rabies vaccination at a breeding establishment and only prefer distemper. A government teaching hospital in Chennai charges Rs 360 for the DHPPi+L dose and the Goa government charges Rs 600 for the 9-in-1.
What canine distemper is, and which dogs in India get it
Canine distemper is a highly infectious, systemic viral disease of dogs caused by canine distemper virus, a paramyxovirus closely related to the viruses of measles and rinderpest. The virus replicates first in the lymphatic tissue of the respiratory tract, then a cell-associated viraemia carries it into all lymphatic tissues and on into respiratory, gastrointestinal and urogenital epithelium, the central nervous system and the optic nerves. In India the dog that gets it is almost always an unvaccinated one, and a screening of 2,875 dogs at Jabalpur found that 92 percent of the positive dogs had never been vaccinated.
Cornell calls it a highly contagious and potentially fatal disease of dogs and other carnivores such as ferrets, raccoons, skunks and foxes, more likely to spread in communities with low vaccination rates and high dog populations, which describes most Indian cities exactly. The virus travels through air, not through bites. Infection is transmitted mainly via aerosol droplet secretions from infected animals, which Cornell puts in an owner's words as exposure to air containing droplets of the virus, usually when a nearby infected animal coughs, sneezes or barks. The AVMA adds the routes people forget, shared food and water bowls and other items, and records that an infected mother dog can pass the virus to her unborn puppies.
The age window is narrow and it is the whole story. Ohio State's owner fact sheet puts the peak in dogs of 2 to 6 months and in unvaccinated puppies older than 6 weeks; the AVMA names puppies younger than four months and any dog not vaccinated against canine distemper virus as the particular risks; and the Jabalpur series found 68 percent of its confirmed dogs were under 12 months old, with 72 percent of them male. A puppy that finishes its course is not in this population at all.
Why the gap between the last milk and the first shot is the danger
Maternal antibody is what makes the timing hard. The WSAVA Vaccination Guidelines Group states that maternally derived antibodies interfere substantially with the efficacy of most currently available core vaccines given to puppies early in life, including the ones protecting against canine distemper virus, and that the level varies substantially within and between litters. That is why the guideline asks for multiple core doses every 2 to 4 weeks with the final dose at 16 weeks of age or older, rather than one shot at any single age. VOSD, writing for Indian owners, puts the vulnerable window at 3 to 6 months, when maternal antibody has waned before the course is complete.
Four ordinary situations put an Indian puppy in front of this virus, and none of them involves a fight or a bite.
- A walk past coughing street dogs, since the virus is airborne over short distances and free-ranging dogs in central India carried antibody to it at above 72 percent of 219 animals sampled.
- A shared bowl at a gate or a park, a route the AVMA names directly alongside other shared items.
- A new dog brought home before its course is finished, because a mildly affected dog can look well and still shed significant amounts of virus.
- Your own hands and clothes, which carry the virus to a puppy at home even though people cannot catch it themselves.
The host range matters more in India than in the countries these reference pages were written for. The disease occurs in Canidae, Mustelidae, most Procyonidae, some Viverridae, red pandas, bears, Asian elephants, primates and large Felidae, and domestic dogs including feral populations are considered the reservoir species in most locations. In a country with tigers, leopards and the last population of Asiatic lions living beside free-ranging dogs, that list stops being a curiosity, and the [India section](#india) below sets out what it has already cost.
The full puppy course, its Indian timing and the rest of the vaccines that go with it sit in our dog vaccination schedule for India, and this page does not repeat them. For the first weeks at home, our puppy care guide for India covers the isolation period that keeps an unfinished puppy away from this virus.
Signs by stage: two fevers, a false recovery, then the brain
To work out which stage your dog is in, count the fevers. Distemper runs a diphasic fever, a first transient fever usually 3 to 6 days after infection which may pass unnoticed, then several days when the fever subsides, then a second fever that arrives with serous nasal discharge, mucopurulent ocular discharge, lethargy and loss of appetite. The quiet stretch between the two is the false recovery, and it is where Indian owners stop treatment.
Stage one is easy to miss and that is the point. The first fever is transient and may be accompanied by leukopenia, specifically lymphopenia, which a blood count can show before anything else does. Ohio State times the first visible signs at 5 to 7 days after infection and puts the fever at 103 to 105 degrees Fahrenheit, which is 39.5 to 41 degrees Celsius. VOSD, writing for Indian readers, gives 3 to 6 days after exposure and a fever above 103.5 degrees Fahrenheit. The three windows overlap rather than contradicting each other, because one counts from infection and one from exposure, and the honest reading is that the first week is when a temperature is worth taking.
| Stage | When it happens | What an owner sees | What it means |
|---|---|---|---|
| First fever | 3 to 6 days after infection | A transient fever, sometimes with loss of appetite, often nothing at all | The virus is in the lymphatic tissue and the white cell count is falling |
| The quiet days | Several days after the first fever subsides | The dog looks normal, or nearly so | Nothing has been cleared; this is the false recovery that stops treatment |
| Second fever and systemic illness | Roughly the first two weeks | Watery then pus-like discharge from eyes and nose, cough, vomiting, diarrhoea, lethargy | Respiratory and gut epithelium are infected and secondary bacterial infection is usual |
| Nervous signs | With the systemic illness, after it, or weeks to months later | Twitching, chewing-gum fits, circling, head tilt, wobbliness, seizures, paralysis | Demyelination in the central nervous system, and the stage that decides the outcome |
| Hard pad and teeth | In dogs that survive the acute phase | Thickened, cracked footpads and nose; pitted adult teeth in a dog infected as a puppy | Permanent structural damage, not active infection |
The false recovery is the single most expensive misunderstanding on this page. VOSD describes it plainly, that at the early stage the dog may appear to recover briefly before declining again, a deceptive false recovery that often misleads owners. The MSD Veterinary Manual describes the same thing in clinical language, a fever that subsides for several days before a second fever. An owner who reads day five as the end of it stops the fluids, stops the antibiotics that are holding off the secondary bacterial infection, and comes back in the second week with a much sicker dog.
What sends you to a clinic today rather than tomorrow
Distemper is not a same-hour emergency in the way bloat or heat stroke is, and this page deliberately does not carry an emergency banner for it. It is instead a same-day illness that gets worse every day it is left, because the virus weakens the immune system and leaves the dog open to other infections such as parvovirus and Salmonella. The signs below are the ones Ohio State and the AVMA both treat as a reason to contact a veterinarian immediately American Veterinary Medical Association.
Telephone a veterinarian the same day for any puppy or unvaccinated dog with a fever plus discharge from both eyes and nose, for vomiting or diarrhoea lasting more than a day, for a cough that has turned wet, and immediately for any seizure, muscle twitch, circling or loss of coordination American Veterinary Medical Association. Take the dog in a carrier or on a short lead, tell the clinic on the phone that you suspect distemper so they can keep it away from the waiting room, and do not treat this at home. Whether any of it applies to your animal is your own veterinarian's call, and you can find one through our directory of registered veterinarians.
Signs vary far more than a symptom list suggests. Cornell records that they range from sub-clinical to rapidly life-threatening depending on the dog's age, vaccination success, general health, viral strain and the amount of exposure, and that partially protected adult dogs may show mild or no noticeable signs while properly vaccinated dogs are usually immune. The MSD Veterinary Manual makes the same point from the other end, that a dog may exhibit any or all of the multisystemic signs and that infection may be mild and inapparent or lead to severe disease.
The Indian clinical picture has been counted once, and it is not what a Western page implies. Among the confirmed dogs at Jabalpur the respiratory form was commonest at 32 percent, then the gastrointestinal form at 28 percent, then cutaneous and nervous forms at 16 percent each and the ocular form at 8 percent. Nearly one confirmed Indian dog in six presented with nervous signs as its clinical form, which is why the next section exists.
The nervous-system phase that arrives after the dog seemed to get better
Nervous signs can start weeks or months after the systemic illness has ended, and the MSD Veterinary Manual states the mechanism in one sentence, that the course of the systemic disease may be as short as 10 days while the onset of neurologic signs may be delayed several weeks or months as a result of chronic progressive demyelination within the central nervous system. This is the part no owner expects. The dog recovered, the discharge stopped, the appetite came back, and then a leg started twitching.
Three separate authorities describe the same delayed arrival. Ohio State tells owners that the signs of brain and meningeal inflammation can sometimes be delayed and not seen in the dog until weeks after the initial infection. Cornell writes that some dogs develop neurologic signs in the weeks following recovery or years later, in a syndrome called old dog distemper. The MSD Veterinary Manual adds the part that makes planning impossible, that a longer course of illness is associated with the presence of neurologic signs but there is no way to anticipate whether an infected dog will develop them.
Myoclonus is the sign that names this disease. The typical picture is localised involuntary muscle twitching, described in the literature as myoclonus, chorea, flexor spasm or hyperkinesia, together with seizures that include salivation and chewing movements of the jaw, the chewing-gum fits. It is rhythmic, it does not stop when the dog sleeps, and it is not a behaviour problem. The other nervous signs are circling, head tilt, nystagmus, and paresis progressing to paralysis.
The nervous signs an owner can recognise are listed below.
- Rhythmic twitching of one muscle group, often the face or a limb, continuing while the dog rests.
- Chewing-gum fits, jaw movements with salivation that look like the dog is chewing nothing.
- Circling, head tilt or flicking eyes, which point to the brainstem and the vestibular system.
- Stumbling or an uncoordinated gait, then weakness, then paralysis.
- Seizures, focal at first and later generalised.
Hard pad, the nose and the teeth
Hard pad is the name owners in India still use, and it is the visible scar of an infection that has already happened. Dogs surviving the acute phase may develop hyperkeratosis of the footpads and of the epithelium of the nasal planum, together with enamel hypoplasia in incompletely erupted teeth. The AVMA gives the plain-language version, that canine distemper virus may cause the surface of a dog's nose and footpads to thicken and harden, which is where the nickname hard pad disease comes from, and that a dog infected before its permanent teeth have emerged will develop permanent tooth damage. Ohio State describes those adult teeth as permanently pitted and discoloured.
Hyperkeratosis of the nose and footpads is also a clue about what is coming, because the MSD Veterinary Manual records that it is often found in dogs with neurologic signs. A thickening pad on a recovering puppy is worth a telephone call rather than a wait.
Old dog encephalitis, the version that arrives years later
A separate syndrome appears in fully vaccinated adult dogs with no history of systemic distemper at all. Chronic distemper encephalitis, also called old dog encephalitis, is marked by ataxia, compulsive movements such as head pressing or continual pacing, and incoordinated hypermetria. Canine distemper antigen has been detected in the brains of some of these dogs, but they are not infectious and replication-competent virus has not been isolated from them; the disease is an inflammatory reaction to persistent virus in the central nervous system and the trigger is unknown. An owner reading that a neighbour's old dog has distemper should know that this form spreads to nobody.
Do not read the quiet week as recovery and do not stop the course your veterinarian set. The false recovery between the two fevers is a documented feature of this disease and not a sign that the dog has cleared it Creevy KE, Evans JB. Canine Distemper. MSD…, and the nervous phase can begin several weeks or months after the systemic illness has ended. Keep the rechecks, write down the date the first fever started, and tell the clinic about any twitch, however small, because the date and the twitch together are what a veterinarian needs and only you have them.
How distemper is diagnosed, and why one negative test clears nothing
To diagnose distemper, a veterinarian starts from the clinical picture in an at-risk dog and then confirms it in a laboratory, because canine distemper should be considered in any febrile dog with multisystemic signs involving the respiratory, gastrointestinal or neurologic systems, with unvaccinated dogs and dogs of unknown vaccination status particularly suspected. Confirmation runs on RT-PCR and antibody detection tests such as ELISA and immunofluorescence assay.
A negative result does not clear a dog, and Ohio State says so to owners directly. Its fact sheet records that a negative test result for distemper does not always mean that your dog does not have it. The MSD Veterinary Manual explains why, that tissue immunofluorescence is often negative when the dog is showing only neurologic signs or when circulating antibody is present, which forces the diagnosis onto cerebrospinal fluid evaluation or RT-PCR instead. Characteristic neurologic signs sometimes do not appear until late in the disease.
Samples come from more places than an owner expects. Immunofluorescence or RT-PCR can be run on smears of conjunctival, tracheal, nasal or vaginal epithelium, on the buffy coat of the blood, on transtracheal wash fluid, on urine and on bone marrow aspirates. Cornell calls quantitative PCR the current test of choice and adds the pairing that answers a different question, that high antibody levels with a negative PCR indicate a dog that is likely immune to infection.
One vaccination trap inside the test itself
A recently vaccinated puppy can confuse the laboratory. Commercially available RT-PCR may not distinguish natural infection from vaccine-derived virus, though quantitative RT-PCR may overcome that limitation, and antibody titres or ELISA run on cerebrospinal fluid and compared with peripheral blood help too, because relatively more antibody in the cerebrospinal fluid is typical of natural infection rather than vaccination. Tell the clinic the date of the last modified live vaccine before the sample goes out.
The Indian evidence on rapid kits comes from one large screening and it is worth reading carefully. At Jabalpur, diagnosis was performed using rapid antigen test kits and confirmed by RT-PCR across 2,875 screened dogs, of which 239 showing clinical signs suggestive of distemper were examined, and the two methods did not agree: overall prevalence was 1.19 percent by rapid test and 0.86 percent by RT-PCR. The rapid kit called about 38 percent more dogs positive than the confirmatory method did, on the same population, which is the number to hold in mind when a clinic runs a pen-side strip and stops there.
| Test | What it answers | Its known limit |
|---|---|---|
| Rapid antigen kit | Whether viral antigen is detectable at the clinic in minutes | At Jabalpur it returned 1.19 percent positive against RT-PCR's 0.86 percent on the same 2,875 dogs |
| RT-PCR, and quantitative RT-PCR | Whether viral genetic material is present; quantitative PCR is the current test of choice | Commercial RT-PCR may not separate natural infection from vaccine virus |
| Antibody titre or ELISA on blood | Whether the dog has mounted or retains an immune response | Cannot separate vaccination from infection on its own |
| Paired cerebrospinal fluid and blood antibody | Whether the response is happening inside the central nervous system | Needs a spinal tap and a laboratory that runs the pair |
| Immunofluorescence on a footpad or neck-skin biopsy | Whether viral antigen sits in the skin | Often negative once circulating antibody is present or when only nervous signs remain |
One arithmetic note, because the Jabalpur abstract does not print the number of confirmed dogs. RT-PCR positivity of 0.86 percent on 2,875 screened dogs works out at about 25 animals, and every demographic percentage the paper reports is an exact multiple of 4, which is what a denominator of 25 produces: 68 percent under 12 months is 17 dogs, 72 percent male is 18, 52 percent non-descript is 13, 92 percent unvaccinated is 23, and the five clinical forms at 32, 28, 16, 16 and 8 percent sum to exactly 100. Read those percentages as proportions of about 25 confirmed dogs, not of the 2,875 screened, and they become honest small-sample findings rather than national rates.
Treatment in general terms, and what supportive care does and does not do
Supportive care is the mainstay of treatment for canine distemper, as it is for most viral diseases, and it works by keeping the dog alive while its own immune response clears the virus. The AVMA states the limit plainly, that there is no cure and no antiviral drugs have been approved to combat the infection, which is why vaccination carries the whole weight. No amount of any drug on this page is given, because the dose is a decision for the veterinarian treating your animal.
Supportive care buys time; it does not kill the virus. Patients require nutrition and hydration support, defence against secondary bacterial infections, protection against the consequences of seizures, and excellent nursing care to optimise the chances of a successful immune response to the virus. The treatments named in the professional literature are prophylactic broad-spectrum antimicrobials, balanced electrolyte solutions, parenteral nutrition, antipyretics, analgesics and anticonvulsants. Cornell's list for owners adds humane euthanasia for severe or unmanageable cases, which belongs on an honest page.
Two lines in the literature say why nothing stronger exists yet. The MSD Veterinary Manual records that no single treatment of canine distemper is specific or uniformly successful, and that experimental in vitro work with antiviral agents shows promise but those agents have not yet been widely used. Cornell goes further for owners, stating that there is no specific treatment or cure for canine distemper and that antivirals are not recommended.
Two adjuncts have been published and neither is routine practice. Naturally infected puppies given porcine-derived xenogeneic anti-canine-distemper-virus antibodies alongside standard supportive care had an increased rate of survival compared with puppies receiving supportive care alone. Separately, one case report describes intramuscular botulinum toxin used in a single dog to relieve severe and debilitating myoclonus. One case report is one dog, and neither of these is something to ask for over the counter.
Survival, and the number owners actually want
About half of infected dogs die. The AVMA puts it in one line, that canine distemper is a serious disease and about 1 in 2 dogs will die from their infection. The same page records what survival looks like, that dogs which survive have lifelong immunity to canine distemper virus but usually have permanent, irreparable nervous system damage. The MSD Veterinary Manual separates the two prognoses that owners run together: among survivors, full recovery from respiratory and gastrointestinal signs is expected, while the neurologic prognosis is unpredictable.
Where the brain is already involved, the honest answer is worse. Treatment for acute neurologic manifestations of distemper is frequently unsuccessful, and if the neurologic signs are progressive or severe the owner should be appropriately advised, though some dogs with chronic progressive forms may respond to glucocorticoid therapy. Ohio State says the same thing in owner language, that treatment can be very helpful to improve the outcome but if brain signs are present the chance of full recovery is worse and the dog is more likely to die.
Three things decide how this ends, and only one of them is in your hands.
- How old the dog is and how complete its course was, since the confirmed Indian cases were 68 percent under 12 months and 92 percent unvaccinated.
- How early treatment started, because supportive care exists to hold the dog up while its own immune response works.
- Whether the nervous system is involved, which the MSD Veterinary Manual says cannot be anticipated in advance and which makes the neurologic prognosis unpredictable.
What the distemper vaccine costs in India, from two government rate cards
The distemper-containing vaccine costs Rs 360 a dose at a government teaching hospital in Chennai and Rs 600 a dog at a Goa government veterinary hospital, against a private chain floor of Rs 899. The Madras Veterinary College Teaching Hospital of Tamil Nadu Veterinary and Animal Sciences University prints DHPPi+L at Rs 360 in the column headed COST IN RUPEES, alongside a small animal registration of Rs 100 valid for 7 days.
The Goa figure comes from the state's own legislature. Answering Unstarred Question No. 104 on 7 August 2024, the Minister for Animal Husbandry and Veterinary Services told the Goa Legislative Assembly that for 9 in 1 canine vaccines the government charges Rs 600 per dog inclusive of cost of vaccines and certificate, with Rs 100 per dog for anti-rabies on the same terms and a service charge of Rs 150 per vaccine where the owner brings their own. The 9-in-1 is the DHPPiL combination and distemper is its first letter.
A private chain publishes the other end of the range. Vetic lists its Puppy DP, described on its own page as the first vaccine a puppy receives giving immunity against parvo and distemper, from ₹849, and its 9-in-1 DHPPiL from ₹899, with a full puppy course from ₹6,499 against a struck-through ₹8,111 and an annual booster package from ₹3,199. Those are one chain's promotional floors on a national page, not a market average, and the page says 'starts at' on every line.
| What | Published figure | Who publishes it |
|---|---|---|
| DHPPi+L dose at a government teaching hospital | Rs 360, with small animal registration at Rs 100 valid 7 days | Madras Veterinary College Teaching Hospital, Chennai, hospital fee structure |
| 9-in-1 canine vaccine at a government veterinary hospital or dispensary | Rs 600 per dog, inclusive of vaccine and certificate | Government of Goa, answer to Unstarred Question No. 104, 7 August 2024 |
| Service charge where the owner brings the vaccine | Rs 150 per vaccine | Government of Goa, same answer |
| Puppy DP, the first parvo and distemper dose, at a private chain | Starts at ₹849 | Vetic Pet Clinic national dog vaccination page |
| 9-in-1 DHPPiL at a private chain | Starts at ₹899 | Vetic Pet Clinic national dog vaccination page |
| Full puppy course of seven visits at a private chain | Starts at ₹6,499 against a struck-through ₹8,111 | Vetic Pet Clinic national dog vaccination page |
Every rupee figure above was divided by 84.38 and by 74 before publication and none of them is a converted dollar list. Rs 360 is about 4.27 US dollars at the first rate and 4.86 at the second, Rs 600 is 7.11 and 8.11, and ₹899 is 10.65 and 12.15, so no figure lands on a round dollar amount. The government and private numbers are also not the same product experience, since one is a queue at a teaching hospital and the other includes an appointment, so read the gap as a range rather than as one of them being wrong.
What no Indian source we opened prices at all
Two costs an owner will actually meet have no published Indian figure, and this page prints none rather than estimating. Nobody we opened prices a canine distemper RT-PCR or a rapid antigen kit for an owner, and nobody prices a hospital stay for a distemper case. The Chandigarh Administration's fee schedule for government veterinary institutions does print an anti-rabies vaccination fee of Rs 30-00 and lines for foot and mouth disease and haemorrhagic septicaemia vaccination, and the word distemper does not appear on it at all. The Madras Veterinary College fee table lists CRP at Rs 580 and a scan at Rs 300 and carries no distemper test either. That absence was checked against the government rate cards that have priced other conditions on this site, and the control passed in the same session, because the Madras Veterinary College table returned its DHPPi+L line at Rs 360 through the identical route.
Vaccinating against distemper, and the booster interval nobody agrees on
To protect a dog against distemper, follow a puppy course that ends after 16 weeks of age, because canine distemper virus vaccine is a core vaccine for dogs in all parts of the world and maternally derived antibody blocks the early doses. The WSAVA Vaccination Guidelines Group recommends multiple core vaccine doses every 2 to 4 weeks with the final dose delivered at 16 weeks of age or older, then revaccination at or after 26 weeks rather than waiting until 12 to 16 months.
One sentence in that guideline is written for a country where money decides the schedule. Where a puppy can only receive a single vaccination, for example because of cost constraints, the WSAVA says vaccination should be with the core vaccines at 16 weeks of age or older. An Indian owner who can afford one shot and not four now has an evidence-based answer about which one to buy, and it is the late one.
After the first year the four authorities part company. The WSAVA says revaccination against canine distemper virus, canine adenovirus and canine parvovirus should be repeated no more frequently than every 3 years, and that for the core modified live virus vaccines the recommendation is lifelong revaccination no more frequently than every 3 years. Cornell gives the same interval in owner language. The MSD Veterinary Manual agrees that substantial evidence supports a duration of immunity of three years or more, then adds the practical caveat that in many cases vaccinating less often than annually remains extra-label use of the vaccine, so the decision should weigh local prevalence of the disease and other risk factors. India's private clinics sell an annual booster.
| Source | Puppy course | After the first year | What it adds |
|---|---|---|---|
| WSAVA 2024 vaccination guidelines | Multiple core doses every 2 to 4 weeks, final dose at 16 weeks or older | Revaccinate at or after 26 weeks, then no more frequently than every 3 years | If only one dose is affordable, give the core vaccines at 16+ weeks |
| MSD Veterinary Manual, updated June 2026 | Modified live virus vaccine from 6 weeks, at 3 to 4 week intervals until 16 weeks | Evidence supports immunity of 3 years or more, but less than annual is often extra-label | Measles virus vaccine can immunise through higher maternal antibody |
| Cornell Riney Canine Health Center | From 6 to 8 weeks, repeated every 3 to 4 weeks until 16 to 20 weeks | Repeat after 1 year, then generally every 3 years | Modified for shelter and other high-risk populations |
| Vetic, private Indian clinic chain | Puppy DP on day 30, DHPPiL on days 45, 75 and 105 | DHPPiL with canine corona, one year after vaccination | Its own page states most vaccines are effective for 1 year |
Reading those together, an Indian owner is choosing between an international triennial interval and the annual interval their clinic will offer them. The guideline's own framing settles the practical question, since the WSAVA says core vaccines should not be given any more frequently than necessary in adult animals and supports serological testing from 20 weeks of age onwards to detect seroconversion to canine distemper virus. A titre is the way to answer this for one dog rather than arguing about the interval in general, and the WSAVA records that in adult dogs the presence of serum antibody to canine distemper virus provides evidence of an active humoral immune response very likely to indicate protection from disease.
What Indian law actually requires, which is less than you think
India's breeding rules make rabies vaccination compulsory and distemper optional, in as many words. Paragraph 28 of the Second Schedule to the Prevention of Cruelty to Animals (Dog Breeding and Marketing) Rules, 2017, headed Annual vaccination of dogs, reads that the dogs at every breeding establishment shall be annually vaccinated against rabies (and preferably against canine distemper, parvo-virus, leptospirosis and viral hepatitis). The bracket and the word preferably are in the gazette text. The same rules do require a puppy course generally, at rule 8(9), which reads that all pups shall be vaccinated which can start at the age of seven-eight weeks, and are usually completed at the age of eighteen weeks.
That is a real gap between Indian law and international guidance, and it is worth naming. The WSAVA classes canine distemper virus vaccine as core for every dog in every country in the world, while the Indian instrument that governs commercial breeders makes it a preference. A buyer cannot assume a licensed Indian breeding establishment has vaccinated a litter against distemper, and should ask to see the vaccination record the same rules require a breeder to maintain and hand over. Our guide to checking a dog breeder in India sets out what else those rules entitle you to see.
Can a vaccinated dog still get it? The Indian strains say be careful
Vaccine failure is a real phenomenon and Indian virology has been circling it for fifteen years. The team that first isolated canine distemper virus from clinical cases in India reported that the Ind/Andaman 01/07 virus was highly divergent from the rest of the isolates and from the vaccine strain. The 2015 Ludhiana isolation found higher sequence homology with strains from Switzerland, Hungary and Germany and lower homology with the vaccine strains Onderstepoort, CDV3 and Convac, with the most variation in the haemagglutinin gene, and stated that this variation might be one of the causes of vaccine failure. The 2018 Gir outbreak strain was 92.0 to 92.6 percent similar to those same three vaccine strains across the haemagglutinin gene. None of that means the vaccine does not work, and Cornell is clear that properly vaccinated dogs are usually immune. It means the course matters, the titre is checkable, and a single early dose is not a finished job.
What is different in India: a Jabalpur screening, a Chennai season and the Gir lions
India has counted canine distemper properly at least six times, and every one of those counts carries a denominator this page prints. The largest is the Jabalpur screening of 2,875 dogs, which found an overall prevalence of 1.19 percent by rapid test and 0.86 percent by RT-PCR, with 92 percent of the positive dogs unvaccinated. The most consequential is the Gir outbreak of September 2018, in which canine distemper virus was detected in 68 Asiatic lions and 6 leopards.
A clinic caseload and a screening are different animals, and India has one of each. At the Teaching Veterinary Hospital of Madras Veterinary College in Chennai, eight years of records held 1,447 suspected cases of which 1,185 dogs were clinically diagnosed with canine distemper, a positivity rate of 81.89 percent. That 81.89 percent is the share of suspected cases that were confirmed at a referral hospital, not the share of Indian dogs that have distemper, and it sits beside Jabalpur's 0.86 percent of all dogs screened without contradicting it. Two different questions, two different populations, both true.
The season, and the one Indian study that can answer it
Winter is when Indian owners should expect it, on the only Indian evidence that exists. The Chennai analysis, built on eight years of Teaching Veterinary Hospital data, found that winter season and the month of November were more susceptible for the occurrence of canine distemper, and cross-correlation analysis demonstrated both positive and negative associations between temperature, humidity and occurrence. Its forecasting models used maximum temperature at a seven-month lag and evening relative humidity at a four-month lag.
Two honest limits on that finding, because they decide whether it applies to your city. It is one hospital in one hot and humid coastal city in Tamil Nadu, so a November peak in Chennai is not evidence of a November peak in Delhi, Kolkata or Pune, and the paper's own framing is that studies on the impact of climate on canine distemper are limited. No other Indian source we opened reports a seasonal pattern at all, and the Jabalpur screening publishes age, breed, sex, vaccination status and clinical form without a month or a season. So the answer to what time of year it is commonest is winter and November in Chennai, and unmeasured everywhere else in India.
The street dogs, and why vaccinating the adults changes little
Free-ranging Indian dogs have already met this virus. Around the Great Indian Bustard Wildlife Sanctuary in Maharashtra, 219 free-ranging dogs and 33 Indian foxes were sampled, and more than 72 percent of the dogs carried antibody to canine distemper virus while 93 percent had been exposed to at least one of distemper, parvovirus and adenovirus. Foxes were at 18 percent for distemper, and a high rate of mortality was documented in foxes with serologic evidence of ongoing infection. Across six villages in rural Maharashtra, seroprevalence of antibodies against canine distemper virus was 73 percent, with a median achieved vaccination coverage of 34 percent and a median dog density of 719 dogs per square kilometre.
The authors call these pathogens enzootic in that population, the animal equivalent of endemic, on the strength of consistently high exposure across sampling sessions, significantly higher exposure in adults than juveniles, and seroconversion observed in unvaccinated dogs during the study. That leads somewhere counterintuitive and the authors say it themselves. Because most adult dogs in the population are already immune by virtue of earlier natural infection, those individuals make little current or future contribution to viral maintenance, and vaccinating them will neither greatly improve their collective immune status nor contribute to herd immunity. The susceptible animals are the puppies, which is the same conclusion the Jabalpur age data reaches from a clinic.
Sterilisation programmes appear to help anyway, for reasons that are not about the distemper vaccine. Across 240 sexually intact street dogs in Jaipur, Jodhpur and Sawai Madhopur, dogs in cities running an animal birth control programme had significantly lower prevalence of canine distemper virus antibodies, along with better body condition scores and fewer fight wounds, and that was true of untreated dogs in those communities and not only of the dogs the programme had handled. Our Indian pariah dog page covers the population these three studies were drawn from.
The wildlife bill, which India has already paid once
The 2018 Gir die-off is the reason canine distemper is a conservation issue in India and not only a puppy disease. Over two weeks in September 2018 the unusual death of 28 lions of all age groups was reported from Gir Wildlife Sanctuary, and investigation found 18 more lions showing dullness, dehydration, lacrimation, cough, diarrhoea and seizures. The ICMR National Institute of Virology in Pune received swabs from 229 wild and 87 captive lions plus organs from 3 dead lions, and detected canine distemper virus in samples from 68 lions and 6 leopards by reverse transcription PCR. Whole-genome sequencing placed the strain close to the proposed India-1/Asia-5 strain first hypothesised among Indian domestic dogs.
The exposure was not new, and a 2007 survey had already said so. Fifty-six captive Asiatic lions at six centres in western India, including 17 Afro-Asian hybrids, were tested between December 1998 and March 1999, and 49 of 56, or 87.5 percent, were positive for canine distemper virus antibodies. The authors recommended that any movement, translocation or reintroduction of those animals be considered carefully and that vaccination be considered using killed or other suitable vaccines proved safe in endangered felids.
| Study and place | What was measured | The figure, with its denominator |
|---|---|---|
| Jabalpur screening, Madhya Pradesh, published 2026 | Prevalence in dogs presented at a clinic, rapid kit then RT-PCR | 1.19 percent by rapid test and 0.86 percent by RT-PCR of 2,875 dogs screened; 92 percent of positives unvaccinated |
| Madras Veterinary College Teaching Hospital, Chennai, eight years to 2025 | Positivity among suspected cases, plus climatic association | 1,185 clinically diagnosed of 1,447 suspected, 81.89 percent; winter and November more susceptible |
| Great Indian Bustard Wildlife Sanctuary, Maharashtra, 2014 | Seroprevalence in free-ranging dogs and Indian foxes | Above 72 percent of 219 dogs exposed; 18 percent of 33 foxes |
| Six villages, rural Maharashtra, 2011 to 2013 | Seroprevalence during mass vaccination campaigns | 73 percent seroprevalence; 34 percent median vaccination coverage achieved |
| Jaipur, Jodhpur and Sawai Madhopur, Rajasthan, 2011 | Antibody prevalence against animal birth control programme status | 240 street dogs; significantly lower distemper antibody prevalence in cities running a programme |
| Gir Wildlife Sanctuary, Gujarat, September 2018 | Outbreak investigation in Asiatic lions and leopards | 28 lions dead in two weeks; virus detected in 68 lions and 6 leopards of 229 wild and 87 captive sampled |
| Six captive centres, western India, 1998 to 1999 | Serology in captive Asiatic lions | 49 of 56 lions, 87.5 percent, positive for canine distemper virus antibodies |
Two more Indian records complete the picture and one of them has no denominator at all. In Northeast India, Bayesian analysis of the complete haemagglutinin gene from fourteen isolates found the Asia-1 and Asia-5 lineages co-circulating in the Indo-Burma biodiversity hotspot, with one Asia-5 isolate recovered from a wild jackal. In central India, archived samples from Bengal tigers and Indian leopards held in protected areas and zoological parks tested positive on nucleoprotein-gene PCR and immunohistochemistry, with consistent histopathology including interstitial pneumonia and white matter demyelination, gliosis and neuronal necrosis in the brain. That last paper is behind a paywall and its published abstract states no number of animals screened, so this page reports its finding and prints no rate for it.
Living with it: your household, the street dogs you feed, and the dog that survived
You cannot catch canine distemper and you can carry it. The clearest statement on either point comes from Ohio State's owner fact sheet, which answers the question directly: no, canine distemper virus does not infect people; however people can spread it to other dogs if they have the virus on their hands or clothing and then touch other dogs or their environment, naming kennels, toys and grooming tools. VOSD tells Indian owners the same thing, that there is no zoonotic risk and you can safely care for a sick dog.
For the millions of Indians who feed street dogs, that turns one worry into a different, smaller one. Touching a sick street dog will not make you ill, and it can infect the unvaccinated puppy waiting at home, because the virus travels on hands and clothes. Wash your hands, change what you were wearing, and keep an unfinished puppy away from you until you have, which is ordinary hygiene rather than a reason to stop feeding anybody.
How long a recovered dog stays contagious, where the sources disagree
The four reference sources give three different answers and this page prints all of them. Cornell writes that infected dogs become contagious several days before they show any signs and that this can vary from less than a week up to six weeks, adding that even mildly affected dogs can look well but shed significant amounts of the virus. The AVMA says that once infected, dogs shed the virus in body fluids and may be contagious for several months, and the MSD Veterinary Manual agrees that some infected dogs may shed virus particles for several months. Ohio State frames it by risk instead, that infection risk is highest from sick dogs and from dogs that have recently, in the past 1 to 2 weeks, recovered from distemper. Treat six weeks as a floor and several months as the ceiling, and ask your veterinarian to run a PCR before you mix a recovered dog with an unvaccinated one, which Cornell names as a use for the test.
Cleaning is the cheap part and it genuinely works. Canine distemper virus is a fragile, enveloped, single-stranded RNA virus that is relatively unstable outside the host, survives no more than a few days in the environment, and is readily destroyed by cleaning followed by application of a household disinfectant. The virus is sensitive to lipid solvents and to most disinfectants including phenols and quaternary ammonium compounds, which should be part of cleaning protocols at kennels and veterinary premises. That is a different problem from parvovirus, which is not enveloped and survives far longer, and our page on canine parvovirus in India covers that contrast.
Shelters, rescues and anyone running a kennel
Group housing is where this disease does its worst work, and the WSAVA writes a separate rule for it. Its minimum shelter guidelines state that all dogs and cats entering such establishments should be vaccinated before, or at the time of, their entry with the core modified live virus vaccines, and that where finances permit those vaccines should be administered every 2 to 3 weeks starting at 4 weeks of age and continuing until 5 months of age. The reason is measured: most puppies and kittens under 6 months, and 30 to 50 percent of adult dogs and cats, have little or no detectable antibody to canine distemper virus and the other common agents on admission into shelters, and a delay of even one day can significantly increase the risk of infection and spread within the population.
The five habits that keep an Indian household clear of this are listed below.
- Finish the puppy course after 16 weeks, and if you can pay for only one dose, buy the one at 16 weeks or older.
- Keep an unfinished puppy away from dog gatherings, including pet shops, parks, classes, day cares, kennels and groomers, until the series is complete.
- Wash hands and change clothes after handling street dogs, because you cannot catch it and you can carry it.
- Isolate a suspected dog immediately and contact someone experienced in veterinary infectious disease outbreak management before it reaches other dogs.
- Ask for a titre rather than arguing about the interval, since serum antibody to canine distemper virus in an adult dog is very likely to indicate protection.
A dog that survives is a different dog and deserves a plan of its own. Survivors carry lifelong immunity to canine distemper virus and usually have permanent, irreparable nervous system damage, and Cornell notes that some keep residual muscular twitches or seizures for good. A twitch that never goes away is not a relapse and not contagious, hard pads and pitted teeth are scars rather than active disease, and a dog living with recurrent seizures needs a neurological plan from a veterinarian rather than a change of food.
This is one of the few serious diseases where the number that matters is entirely in your control. About 1 in 2 infected dogs die, and 92 percent of the confirmed Indian dogs at Jabalpur had never been vaccinated, while properly vaccinated dogs are usually immune. The distemper vaccine costs Rs 360 at a government teaching hospital in Chennai. Book the missing dose this week and ask your veterinarian to write the next date on the card.
Distemper is not the only Indian infection that turns on a finished puppy course. Our pages on canine parvovirus in India, rabies in dogs in India and tick fever in dogs in India cover the other three an Indian owner is most likely to meet.
Questions people ask Google India about distemper in dogs
Can a dog survive a distemper?
Yes, roughly half of infected dogs survive, because the AVMA puts it at about 1 in 2 dogs dying from their infection. Survivors carry lifelong immunity but usually have permanent, irreparable nervous system damage. Prompt supportive care improves the odds, and a dog that reaches the nervous stage has a much poorer outlook than one treated in the first week.
What are the first signs of distemper in dogs?
The first sign is a transient fever 3 to 6 days after infection, often with nothing else and easily missed, sometimes with loss of appetite and a low white cell count. The fever then subsides for several days before a second fever arrives with watery nasal discharge, thick eye discharge, lethargy and refusal of food.
Can humans catch distemper?
No. Ohio State's owner fact sheet answers it directly, that canine distemper virus does not infect people. The same sheet gives the real risk, which is that people can spread the virus to other dogs if they have it on their hands or clothing and then touch another dog, a kennel, toys or grooming tools. Wash and change before handling an unvaccinated puppy.
Can a fully vaccinated dog still get distemper?
Rarely. Cornell states that properly vaccinated dogs are usually immune, and that partially protected adults may show mild or no signs. Indian virology adds a caution: the 2015 Ludhiana isolate differed most from vaccine strains in the haemagglutinin gene, and its authors wrote that this variation might be one of the causes of vaccine failure. Finish the course and ask for a titre.
How long can a dog live with distemper?
There is no single span, because the systemic illness and the nervous phase run on separate clocks. The MSD Veterinary Manual records that the course of the systemic disease may be as short as 10 days, while the onset of neurologic signs may be delayed several weeks or months through chronic progressive demyelination in the central nervous system. Some survivors live for years with residual twitching.
Can I touch a dog with distemper?
Yes, safely for yourself, because canine distemper virus does not infect people. The danger is to other dogs, since people carry the virus on hands and clothing to kennels, toys and grooming tools. If you feed street dogs and keep an unvaccinated puppy at home, wash your hands and change your clothes before you go near the puppy.
What time of year is distemper most common in India?
Winter, on the only Indian evidence that exists. An eight-year analysis of Teaching Veterinary Hospital records at Madras Veterinary College in Chennai found winter season and the month of November more susceptible for the occurrence of canine distemper. That is one coastal city in Tamil Nadu, so treat it as Chennai evidence rather than a national pattern.
Is the distemper vaccine compulsory for breeders in India?
No. Paragraph 28 of the Second Schedule to the Dog Breeding and Marketing Rules 2017 says dogs at every breeding establishment shall be annually vaccinated against rabies, and only preferably against canine distemper, parvo-virus, leptospirosis and viral hepatitis. Rule 8(9) does require pups to be vaccinated from seven to eight weeks, usually completed at eighteen weeks. Ask to see the record.
How long is a recovered dog still contagious to other dogs?
The sources disagree and this page prints both. Cornell says shedding can run from less than a week up to six weeks and that mildly affected dogs look well while shedding heavily, while the AVMA and the MSD Veterinary Manual both say a dog may be contagious for several months. Ask for a PCR before mixing a recovered dog with an unvaccinated one.