Which feline infectious disease is primarily associated with immunosuppression and can be diagnosed with ELISA or PCR?

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Multiple Choice

Which feline infectious disease is primarily associated with immunosuppression and can be diagnosed with ELISA or PCR?

Immunosuppression is the hallmark feature here: feline immunodeficiency virus (FIV) specifically targets and gradually depletes immune system T cells, leaving the cat vulnerable to secondary infections and other complications. Because of this immune dysfunction, testing for FIV relies on both indirect and direct methods. ELISA looks for antibodies the cat has produced against the virus, which indicates exposure and infection. PCR, on the other hand, detects the virus’s genetic material (RNA or proviral DNA), which can confirm infection even if antibody levels are not yet detectable. This combination makes FIV the best answer for a disease that is defined by immunosuppression and diagnosable by either ELISA or PCR. FeLV also affects the immune system but is more classically linked with anemia and leukemia, and while PCR can detect the virus, the association with immunosuppression isn’t as defining. Feline panleukopenia causes severe leukopenia and GI signs rather than a primary immunodeficiency, and feline calicivirus mainly causes upper respiratory signs; neither centers on immunosuppression as the defining feature.

Immunosuppression is the hallmark feature here: feline immunodeficiency virus (FIV) specifically targets and gradually depletes immune system T cells, leaving the cat vulnerable to secondary infections and other complications. Because of this immune dysfunction, testing for FIV relies on both indirect and direct methods. ELISA looks for antibodies the cat has produced against the virus, which indicates exposure and infection. PCR, on the other hand, detects the virus’s genetic material (RNA or proviral DNA), which can confirm infection even if antibody levels are not yet detectable. This combination makes FIV the best answer for a disease that is defined by immunosuppression and diagnosable by either ELISA or PCR.

FeLV also affects the immune system but is more classically linked with anemia and leukemia, and while PCR can detect the virus, the association with immunosuppression isn’t as defining. Feline panleukopenia causes severe leukopenia and GI signs rather than a primary immunodeficiency, and feline calicivirus mainly causes upper respiratory signs; neither centers on immunosuppression as the defining feature.

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