A Study of Illness in a Group of Cleveland Families

Abstract
ANTIBODIES to Toxoplasma gondii are widespread throughout the human population of the United States of America, and yet the epidemiologic behavior of toxoplasmosis, including the mode of transmission, has not been clearly defined.1 Although several large-scale cross-sectional surveys have been made1 2 3 only a few, relatively circumscribed, longitudinal surveys in which a given population has been observed over a specified period have been reported. One longitudinal survey consisted of a study of 2 serum specimens collected seven months apart from each of 359 college students4; the other encompassed an average of 3 serum specimens collected from each of 272 obstetric . . .

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