Summary of Section 13: Conclusions  FIP typically occurs in young cats, and effusions, fever, anorexia, and weight loss are common presenting signs. The sampling of effusions or abnormal tissues by fine-needle aspirates for cytology and FCoV analysis (either RT-qPCR for FCoV RNA load and/or immunostaining for FCoV antigen) can aid diagnosis. Antiviral compounds, especially nucleoside analogues such as oral GS-441524, are effective curative treatments, although treatment is often costly. Trial treatment of cases might be warranted if a diagnosis is very likely, as response to effective antivirals is usually rapid. Without effective antiviral treatment, FIP has a very poor prognosis.  Guidelines will continue to be updated regularly on the ABCD website FIP section (www.abcdcatsvets.org [441]) as new data become available.