| low toxoplasma antibody prevalence in serologic surveys of humans in southern mexico. | antibody prevalence to toxoplasma gondii among residents of a pacific coastal region of oaxaca state, mexico is among low rates reported worldwide. from 60 small, rural communities, 3229 persons from ages 6 months to over 70 years provided blood specimens that were stored on filter papers. 124 (3.8%) of the eluates were seropositive (positive titer greater than 1:256) in the indirect hemagglutination test, and 43 (1.3%) had titers greater than 1:1024. seropositive rates increased by age group an ... | 1991 | 1819978 |