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The prevalence of toxoplasma infection was studied it: 850 healthy children (550 newborn
infants and 300 children aged 6 momhs to 14 years} from a population of low socioeconomic
status in Santiago, Chile. Antibodies were detected in 49 na of the serum samples in children at
birth and in 0 % at 6 months, 2%atl year. 10 n0 at 2 ysa
of age, and in 48 % of the children aged 7-34 years. In order to determine the rate oj infection
and associated epidemiological factors, 50 seronegative infants aged 6 months were followed
up: 11 % ond 14 % of them showed seroconversion after 1 and 2 years, respectively. The
results suggest a significant association between infection and the ingestion of raw or
undercooked meat. The role of cats and vectors such as flies and cockroaches in the
transmission of infection could not be determined owing to the commonness of these two
sources in relation to the small number of subjects studied
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