A dichromatic latex agglutination test for semiquantitative detection of antibodies to Toxoplasma gondii

Abstract

A dichromatic latex agglutination test was employed to measure antibodies to Toxoplasma gondii in 160 sera. Reactions were deemed negative, weak positive, positive or strong positive on the basis of rapidity of agglutination and/or colour change. This semiquantitative determination agreed well with antibody titres measured by immunofluorescence.