Seroprevalence of Bartonella henselae and Toxoplasma gondii among healthy individuals in Thailand

The seroprevalence of Bartonella henselae and Toxoplasma gondii among appar ently healthy individuals, mainly blood donors, in Thailand was investigate d by an indirect fluorescent antibody technique and by a latex agglutinatio n test, respectively. Of 163 serum samples examined, 9 (5.5%) were found to be positive for B. henselae-IgG, 2 (1.2%) for B. henselae-IgM, and 5 (3.1% ) for the T. gondii antibody. No significant difference was observed betwee n male and female samples in the serological test with either B. henselae o r T. gondii. The age of individuals with B. henselae-IgG was distributed fr om the 20s to the 70s, and B. henselae-IgM was found in the individuals of the 30s and 60s. The age of T. gondii positive samples ranged from the 20s to the 60s. In this study, the prevalence of B. henselae infection among he althy individuals in Thailand was serologically demonstrated for the first time.