Serological study of amoebiasis and toxoplasmosis in the Malili area, South Sulawesi, Indonesia.

Results of a serology survey in September 1972 for Entamoeba histolytica and Toxoplasma gondii antibodies among 915 volunteers from the Malili area of South Sulawesi (Celebes), Indonesia are presented. Indirect hemagglutination antibody titers for amoebiasis were found in 22.7% of the sampled population while 9.5% demonstrated antibody titers greater than or equal to 1:128. The frequency distribution of antibody titers were similar by sex and age. There was no significant correlation between stool positivity and seropositivity. Indirect hemagglutination antibody titers for T. gondii were detected in 62% of the population sampled, and titers greater than or equal to 1:32 were demonstrated in 29% of the samples tested. The distribution of antibody titers was similar in males and females. In both sexes the prevalence of IHA antibody titer against T. gondii increased with age. There was no consistent association between altitude and prevalence of seropositive samples.