How can I tell if my cat has a fever?

Visually, you can see that the cat’s abdominal circumference has increased significantly, its spirit and appetite have decreased, and it may even show signs of vomiting, diarrhoea, jaundice and uveitis of the eyes. A hospital visit is required to determine if ascites or pleural fluid has developed. If so, abdominal fluid is extracted to perform a Levantine test as well as a PCR test for feline coronavirus. In addition, an abdominal ultrasound and biochemical blood tests will be done. If the above symptoms are present and the Levantine test is positive and the PCR feline coronavirus test is positive, then it is basically safe to conclude that the cat is infected with infectious peritonitis.