It also is not necessarily protected against future FIP virus infection. Recently, two new tests have been developed that can detect parts of the virus itself. The immunoperoxidase test can diagnose FIP more accurately than traditional histopathologic examination because it detects virus-infected cells in the tissue. A biopsy of affected tissue is necessary for evaluation. Unfortunately, many laboratories use different antigens prepared in different ways, and their interpretation of the assay can differ.
False results can occur from nonspecific reactions unless the tests are meticulously controlled.
The test can be difficult to interpret, since it usually depends on a subjective decision made by the person reading the test. A presumptive diagnosis of FIP can usually be made on the basis of clinical signs, routine laboratory tests, and evaluation of abdominal or chest fluid. Currently, FIP is considered to be a routinely fatal disease once a positive diagnosis has been made. Unfortunately, no cure yet exists. The basic aim of therapy is to provide supportive care and to alleviate the self- destroying inflammatory response of the disease.