Feline infectious peritonitis (FIP) is caused by mutations of feline coronaviruses. Feline coronaviruses are widespread in nature. There are many strains of coronaviruses, and only a few of them can cause cat feline infectious peritonitis.
Cats of all ages may be infected with FIP, but the incidence of old cats and cats less than 2 years old is higher, and purebred cats are more likely to be infected. When cats are infected with coronavirus, some of them rely on their own immunity to completely resist the attack of the virus, before the virus is sick or mutated to kill the virus, some cats (1%-3%) are more unfortunate, their own immune protection ability is not strong enough. They are infected with a coronavirus that causes FIP, or a virus that has mutated in cats to induce FIP, which is transmitted throughout the body by white blood cells in the bloodstream, with the abdomen, kidneys and brain being the most susceptible places for the virus to infect.
Symptoms of feline infectious peritonitis
When said feline infectious peritonitis symptoms, say first cat coronavirus is how to run when disease, when cat infectious peritonitis strain unfortunately, these peritonitis strain will first value in the cat tonsil and gastrointestinal mucosa, and then began to invade the macrophages and a large number of proliferation, then cat will appear the systemic symptom, The symptoms become more pronounced over time and as the disease progresses.
Generally, cats are divided into the early stage and the late stage of abdominal transmission. Cats infected with the virus strain in the early stage will have fever (39.8-40.6℃), lethargy, loss of appetite, weight loss, diarrhea, abdominal circumference increase, respiratory distress and so on.
In the late stage, the symptoms of cat abdominal transmission can be divided into two types: dry and wet. The most prominent symptom of wet FIP is a large amount of fluid in the chest and abdominal cavity, and the abdominal circumference gradually increases. Some cats have respiratory distress symptoms due to pleural effusion. In addition to emaciation and mild fever, dry FIP in cats mainly occurs in the eyes, kidneys and central nerves, including eye opacity, conjunctivitis, eye pus storage, visual impairment, etc. A few of them are accompanied by multiple progressive neurological symptoms, including hindbody paralysis, spasm and tremor, nystagmus, etc. Some cats with dry FIP develop granulomas in the abdominal cavity and fibrous plaques on the serosal surface of the abdominal organs.
But attention dry FIP is almost not accompanied by ascites, and the diagnosis of dry FIP is more difficult than wet FIP. Therefore, cat parents should not judge whether the cat is infected by cat abdominal circumference.