Age–sex distribution ofToxoplasmaantibody in the South Australian population

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Abstract
SUMMARY: Sera from 1071 patients in nine age categories were screened forToxoplasmaantibody by indirect immunofluorescence. Thirty per cent of the sera contained antibody at a titre ≥ 1/16. The percentage of sera containing antibody rose from 3% in the 6 months–5 years age group to a maximum of about 40% in the 31–40 years age group. It remained constant thereafter. Eleven per cent of the 84 sera withToxoplasmaantibody titres ≥ 1/128 hadToxoplasmaIgM titres ≥ 1/32. No significant difference was found in the possession of antibody between the sexes.