Feline infectious peritonitis (FIP) is a viral disease that affects domestic and feral cats. The causative agent of FIP is a coronavirus called feline coronavirus (FCoV). Although FCoV is relatively common in cats, only a small percentage of cats infected with FCoV will develop FIP. FIP is a serious and often fatal disease, and understanding how it spreads is important to prevent its spread.
FCoV is shed in the feces of infected cats, and transmission usually occurs through close contact with infected cats. The virus can be spread through direct contact with an infected cat, such as through grooming, sharing food and water bowls, or through nasal or oral secretions. Additionally, FCoV can survive in the environment for up to several weeks and can be transmitted indirectly through contaminated objects such as litter boxes, bedding, and clothing.
Cat-to-cat transmission of FCoV is influenced by several factors, including the age and immune status of the cats involved, the number of cats in the household, and the stress levels of the cats. Cats under two years of age are more likely than older cats to be infected with FCoV and develop FIP. Also, cats that are immunocompromised due to another disease or medication are also more likely to develop FIP. Cats living in multi-cat households or living in shelters or cattery are at higher risk of exposure to FCoV due to their close proximity to other cats. Stress, such as that caused by traffic, overcrowding, or environmental changes, can also increase the risk of FCoV transmission.
FIP comes in two forms: wet and dry. The wet form of FIP is characterized by fluid accumulation in the abdomen or chest of affected cats, while the dry form is characterized by the formation of nodules or granulomas in various organs of the body. The route of transmission of FCoV does not appear to affect the development of the form of FIP.
The diagnosis of FIP is based on a combination of clinical signs, laboratory tests, and imaging. Clinical symptoms of FIP include fever, weight loss, lethargy, and decreased appetite. Laboratory tests may include blood tests to assess organ function, and serology tests to detect the presence of antibodies to FCoV. Imaging, such as radiographs or ultrasound, can be used to assess the extent of organ involvement in suspected FIP cases.
Currently, there is no cure for FIP and treatment is usually aimed at controlling the clinical symptoms of the disease. Corticosteroids and immunosuppressive drugs can be used to control inflammation and prolong survival, but these treatments are usually not curative. The antiviral drug GS-441524 has shown some promise in the treatment of FIP. After scientific experiments, the cure effect of GS441524 can reach 85%. It is currently the most stable drug for inhibiting FIP virus.
Preventing the spread of FIP requires a multifaceted approach. Reducing stress and overcrowding in households with multiple cats can help minimize the spread of FCoV. Litter boxes and other items shared by multiple cats should be cleaned and disinfected regularly. In addition, a vaccine against FCoV is available, but its effectiveness in preventing FIP is limited.
In conclusion, FIP is a viral disease affecting cats, caused by FCoV. FCoV is mainly transmitted through direct contact with infected cats or indirectly through contaminated objects. FIP is a serious and often fatal disease and precautions should be taken to reduce the risk of transmission. These include reducing stress and overcrowding in households with multiple cats, regular cleaning and disinfection of shared items, and vaccination against FCoV.