Toxoplasma gondii is parasitic coccidia capable of invading almost every species, including humans. In Serbia, undercooked pork is considered to be the main source of human infection. Serological screening of pigs for T. gondii antibodies is one of the measures, proposed by European Food Safety Authority, that should contribute to better controle of the parasite. Currently, most promising tests in this fIeld are enzyme-linked immunosorbent assay and indirect immunofluorescence antibody test.