Overview |
Cat flu or upper respiratory disease associated with several different infectious agents, which can cause similar signs. Feline herpesvirus (FHV) or feline calicivirus (FCV) are most commonly involved, other infections include feline chlamydophilosis and other bacterial infections, such as Bordetella bronchiseptica (the cause of kennel cough in dogs), Pasteurella multocida and Mycoplasma species. |
Transmission |
Direct contact with infected or carrier cats’ tears, saliva and nasal/eye discharge, in some cases indirect contact from the environment. Bordetella bronchiseptica can be sourced from direct or indirect contact with infected cats or dogs. |
Contagious nature |
High |
Incubation period |
2–10 days, depending on the infection involved |
Signs of infection |
Upper respiratory disease, sneezing, nasal/eye discharge, conjunctivitis, fever, oral ulcers. Symptoms can vary according to the infection involved, and the pattern of signs may make the vet more suspicious of specific infectious agents. |
Carrier status |
Varies according to the infection involved, shedding may be for a few weeks-months or be intermittent – please refer to individual disease information sheets. |
Diagnosis |
Eye/throat swab, but often managed on clinical signs, without diagnosis being necessary. |
Treatment |
For viral causes currently no drugs are available to kill these viruses, so treatment is aimed at supporting the cat through this illness and treating any signs or secondary infections. For this reason, there is often no benefit in testing to diagnose which specific infection is causing the symptoms. For feline chlamydophila infection a 3 week course of suitable antibiotics and topical treatments such as eye drops are advised. If this is suspected treatment could be started without a definitive diagnosis. |
Prognosis |
Generally good, but some cases, such as the very young, very old, immunosuppressed and unvaccinated cats may be more likely to develop severe disease and on occasion die as a result of their flu. Some cats with FHV may develop long term chronic nasal/eye/airway/sinus disease. |
Prevention |
Primary vaccination course and regular boosters covering FHV and FCV should be given to all cats. Vaccination does not guarantee protection, but should in many cases reduce the severity of the disease. Annual vaccination is also available against feline chlamydophila, but this is not considered a core vaccination. |
Homing |
Potential owners must be advised that the cat has had cat flu, and that we don’t know if it is still shedding. They should not be homed with immunosuppressed or unvaccinated cats due to the increased risk of them contracting the virus. |
Husbandry |
Isolate and barrier nurse. |
Survival in the environment |
Up to 10 days, depending on the infection involved. |
Disinfectant susceptibility |
Quaternary ammonium, inorganic peroxygen compounds or bleach – see CP preferred products on CatNav and the Operations section of the branch/adoption centre manual for further information. Peroxygen compounds or bleach are generally recommended for environmental disinfection when managing infectious disease cases in CP cats. |
Zoonosis (infectious to people) |
No |
Licensed boarding cattery stance |
Cats should be vaccinated at least 7 days before admission to a cattery. They may not accept cats showing signs of flu. Isolation facilities may be available for persistent carriers or cats showing signs of disease. |
Insurance issues |
May exclude related chronic disease and upper respiratory tract disease. |
For more information |
CP Veterinary Guide: Cat flu International Cat Care (www.icatcare.org) Related disease information sheets – Feline Herpesvirus, Feline Calicivirus and Feline Chlamydophilosis. |