High prevalence of antibody to Toxoplasma gondii among humans in Surabaya, Indonesia.

Infection with Toxoplasma gondii is of medical importance in relation to a recent increase in cases of acquired immunodeficiency syndrome (AIDS). In the present study, we surveyed antibody to Toxoplasma among 1,761 people in Surabaya, Indonesia. The overall prevalence was 58% with significant differences between males (63%) and females (52%; P < 0.001). Although antibody prevalences at 0-9 years in both genders were less than 10%, those at ages over 10 years were more than 50% in males or more than 40% in females, suggesting an extremely high transmission rate of the parasite to humans in this area. A bimodal pattern in the frequency distribution of Toxoplasma antibody levels suggested a persistent feature of Toxoplasma infection in humans.