American Journal of Epidemiology Vol. 122, No. 5: 890-896
Copyright © 1985 by The Johns Hopkins University School of Hygiene and Public Health
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SEROPREVALENCE OF ZOONOTIC TOXOCARIASIS IN THE UNITED STATES: 19711973
1Department of Research Medicine and Department of Statistics, University of Pennsylvania Philadelphia, PA
2Section of Epidemiology, School of Veterinary Medicine, University of Pennsylvania 3800 Spruce Street, Philadelphia, PA 19104
3Parasitic Disease Division, Centers for Disease Control Atlanta, GA
4Division of Biostatistics, School of Dental Medicine, University of Pennsylvania Philadelphia, PA
Rprint requests to Dr.Lawrence T.Glickman
Demographic characteristics associated with human Toxocara canis infection in children aged one to 11 years were investigated using data from the Health and Nutrition Examination Survey of 1971 to 1973. An enzyme-linked immunoso-bent assay with larval stage antigen was used to measure the concentration of antibodies to T. canis in 1,409 available sera. From 4.6 to 7.3% of the children in different geographic regions of the United States have been infected, with serotogic prevalence approaching 30% among black children of lower soctoec-onomic status aged six to 11 years. For both blacks and whites, higher seroprevalence was associated with a rural residence, increased age in children and number of persons in the household, and with decreased income, education, and number of rooms in the house. Muffivariate logistic regression models indicated that blacks had higher infection rates than whites, even when socioeconomic factors were controlled. Certain critical variables, however, such as exposure to dogs or reliable pica histories, were not available for analysis.
helminsths; serology; Toxocare; zoonoses
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