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Canadian Journal of Infectious Diseases
Volume 7, Issue 5, Pages 326-328
Brief Report

Seroprevalence of Toxoplasma Antibody in a Toronto Population

EL Ford-Jones,1,4,5 I Kitai,1,5 M Corey,1,4,5 R Notenboom,1,2,5 N Hollander,1 E Kelly,1,5 H Akoury,1,3,4,5 G Ryan,1,4,5 I Kyle,6 and R Gold1,5

1Department of Pediatrics, The Hospital for Sick Children, Canada
2Laboratory Services Branch, Ontario Ministry of Health, Canada
3Department of Obstetrics, The Toronto Hospital, Canada
4Mount Sinai Hospital, Canada
5University of Toronto, Toronto, Ontario, Canada
6Department of Family Studies, University of Guelph, Guelph, Ontario, Canada

Received 17 October 1995; Accepted 13 March 1996

Copyright © 1996 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


OBJECTIVE: To determine the prevalence of infection with toxoplasmosis by country of birth and age in a sample of convenience.

DESIGN: Banked sera and the computerized data base of demographic and other factors from an earlier epidemiological study were retrieved.

SETTING: Thirty-eight infant-toddler day care centres in Toronto.

POPULATION: Day care providers from whom informed consent was obtained and banked sera were available.

MAIN RESULTS: Of the 124 providers whose serum was tested, 16 (12.9%) were seropositive. Of those providers born in Canada, 8.2% were seropositive, while of those born outside of Canada, 19.6% were positive (P=0.067, OR 2.68, 95% CI 0.91, 7.94). While there was no significant association of seropositivity with age, the association of seropositivity with country of birth was different in the providers under 30 years of age. Among those born in Canada, 4.6% were seropositive, while among those born outside of Canada 23.1% were seropositive.

CONCLUSIONS: The data supplement the limited existing data on toxoplasmosis infection in Canada. Among Canadians, those born outside of Canada were more likely to be seropositive than those born in Canada, suggesting that there may be a differential risk of congenital infection for infants whose parents were born outside of Canada.