Figure 1.

Decision trees depicting recommended diagnostic steps in a case suspicious of FIP, depending on a cat’s clinical presentation: (a) diagnostic steps recommended in a cat presenting with effusion; (b) diagnostic steps recommended in a cat presenting with neurological signs; (c) diagnostic steps recommended in a cat presenting with uveitis; (d) diagnostic steps recommended in a cat presenting with non-specific clinical signs. CSF = cerebrospinal fluid; FCoV = feline coronavirus; FIP = feline infectious peritonitis; FNA = fine-needle aspirates; IHC = immunohistochemistry; RT-PCR = reverse transcriptase polymerase chain reaction; S gene = spike gene.