Three clinical stages ate seen in FIV-infected cats. The first is an acute
transient illness, characterized by a prominent lymphadenopathy; this is fo
llowed by a largely asymptomatic stage Clinical AIDS-like syndromes occur d
uring the final stage of FIV infection concurrent with an increase in viral
load. Common syndromes include wasting, neurologic disease neoplasia, hema
tologic abnormalities, and secondary or opportunistic infections. While tre
at ment is primarily aimed at supportive care, antiviral treatment can down
regulate FIV replication. No vaccine is yet available; however, vaccine dev
elopment is an active area of research.