الفهرس 
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Abstract
Viral infections and related diseases can cause multiple devastating consequences on the health and life quality for the companion animals. There are many variable viral diseases affecting dogs and cats, some of which can cause high fatality like Feline Infectious Peritonitis in cats, others can result in self-limiting symptoms like canine corona in puppies and some of them could be transmitted to their owners and result in serious diseases like rabies. In our study, we will focus on a major infection caused by feline coronavirus (related to the novel coronavirus, which is currently attracting media attention). Feline infectious peritonitis (FIP) is a deadly pansystemic disease of wild and domesticated Felidae which is appeared as a mutant type for the less harmful feline enteric coronavirus (FeCoV). In Egypt, there is neither detailed data about diseases caused by feline infectious peritonitis nor feline enteric corona viruses till now. The study was performed to highlight on the clinical, pathological and some epidemiological findings for (FIP) diseased cats in Egypt. For this purpose, 169 cats (85 males and 84 females) of different breeds aged from 4 months to 8 years old were examined. Different technical methods were used to confirm the diagnosis of the clinically suspected cases including Rivalta’s test, immunochromatographic tests, ultrasonography, radiography, hematological testing, histopathology, and RT-PCR. Rapid immunoassay SNAP Combo tests were used to exclude viral infection causing resembling symptoms like feline immune deficiency and/or feline leukemia viruses. Nearly 90% of the examined cats (152 out of 169) have been identified as carriers for feline enteric corona virus (FeCoV). Typically, (FIP) clinical signs were observed only in the multi-cat household especially in animal shelters. Nine cases out of 169 were identified with (FIP) disease; the chance to contract the disease was nearly equal for both sexes (five males and four females) and higher incidence was observed in age above two years old. Clinical signs associated with (FIP) were recorded only in cats of foreign breeds (6 Persian and 1 Himalayan and 2 mixed breed) and no (FIP) clinical cases were reported in the Egyptian Mau cats. Frequent incidence of complicating diseases like (FIP) is considered a remarkable challenge for veterinarians especially in its diagnosis. Therefore, more attention and studies are required to ease and confirm the diagnosis of such diseases with less specific symptoms.