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Canine distemper
Canine distemper is a serious and highly contagious viral disease that mainly affects dogs, but also ferrets. It attacks several body systems, including the respiratory, digestive, and nervous systems. This disease can be fatal, especially...
What is it?
Canine distemper is a serious and highly contagious viral disease that mainly affects dogs, but also ferrets. It attacks several body systems, including the respiratory, digestive, and nervous systems. This disease can be fatal, especially in young unvaccinated animals.
The disease is caused by a virus called canine morbillivirus, closely related to the human measles virus. This virus attacks the animal's immune system, making it vulnerable to other infections. It spreads rapidly in environments where several unvaccinated animals live together.
Unvaccinated puppies and young animals are the most vulnerable to this disease. Lack of vaccination, living in groups with other animals, and a weakened immune system also increase the risk of infection. Overcrowded environments such as shelters also promote the spread of the virus.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Signs include fever, nasal and eye discharge, coughing, as well as vomiting and diarrhea. In advanced cases, nervous system disorders may appear such as tremors, seizures, or paralysis. Thickening of the paw pads is also a characteristic sign sometimes observed.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Transmission
The virus is mainly transmitted through the air, via respiratory secretions from infected animals such as coughing or sneezing. Direct contact with a sick animal or contaminated objects can also spread the infection. Puppies and young ferrets are particularly exposed in group settings such as shelters or breeding facilities.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
If your pet shows signs suggestive of this disease, it is essential to consult a veterinarian quickly for professional advice. Only a veterinarian can assess the animal's condition and recommend appropriate care. Never attempt to self-medicate your pet without veterinary advice.
Prevention
Regular vaccination from a young age is the most effective way to prevent this disease. It is also recommended to avoid contact with sick animals or those of unknown origin, especially for puppies not yet fully vaccinated. Maintaining a clean environment and limiting contact in high-risk areas also helps reduce the spread.
References
WOAH — Organisation mondiale de la santé animale (ex-OIE)
Content reviewed by the TunisieVet editorial team · Updated 08 August 2026
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