A Brucella IgG test is a specialized serological blood assay designed to detect immunoglobulin G antibodies produced by the immune system in response to infection by Brucella bacteria. This zoonotic pathogen is typically transmitted to humans through unpasteurized dairy consumption or direct contact with infected livestock.
The presence of IgG antibodies generally indicates a past, chronic, or ongoing secondary stage of brucellosis. Because symptoms often mimic other febrile illnesses like malaria or typhoid, this test is crucial for clinicians aiming to confirm a definitive diagnosis, monitor treatment efficacy, and manage persistent systemic infections effectively.