Feline upper respiratory infection

What is it?

Feline upper respiratory infection is a very common and contagious respiratory disease that mainly affects the nose, throat and eyes. It is caused by several infectious agents often acting together. It is one of the main causes of respiratory diseases in cats, particularly in breeders and shelters in Tunisia.

Commonly observed signs

These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.

Causes and risk factors

Coryza primarily results from infections with feline herpesvirus and feline calicivirus. Bacteria like Chlamydophila felis or Bordetella bronchiseptica can make the disease worse by associating with these viruses. Often, several agents are present at the same time in the same animal.

Kittens, elderly or immunocompromised cats are more vulnerable to this disease. Living in a community, such as in shelters or breeding grounds, greatly increases the risk of contagion. Stress and lack of vaccination are also important contributing factors.

Transmission

The disease is spread by direct contact with the secretions of an infected cat, such as saliva or discharge from the nose and eyes. It can also be spread by contaminated objects such as bowls, litter boxes or human hands. Carrier cats can shed the virus even without visible symptoms.

Diagnosis and care

Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.

Prevention

References

MSD Veterinary Manual

Content reviewed by the TunisieVet editorial team · Updated 18 August 2026