markets in and around Madras City, India were examined for antibodies to Toxoplasma
gondii using the modified agglutination test incorporating mercaptoethanol. Antibodies (>
or= 1: 25) to T. gondii were found in 39.5% of sera. Antibody titers of individual sera (% in
parentheses) were 1: 25 (8.1%), 1: 50 (10.8%), 1: 100 (6.5%), 1: 200 (2.7%), 1: 400 (4.3%),
1: 800 (5.9%) 1: 1,600 (0.5%), and 1: 3,200 (0.5%).