Geographic origin and risk for congenital infection in a Canadian inner city: findings and implications for policy.

This study examines associations between geographic origin and risk for congenital infections, through a chart review of women from the St. James Town area of Toronto delivering at Wellesley Hospital in 1996. Foreign-born women (n = 203) were significantly less likely than Canadian-born women (n = 53) to be HBsAg negative (187/193 vs. 48/48; RR = 0.97, 95% CI 0.94-0.99). There was no significant difference in rubella seronegativity, but rubella immunity was unacceptably low in both groups (less than 90%). A number of rubella non-immune women had delivered previously in Canada. Procedures must be implemented to ensure completion of hepatitis B immunization series in affected newborns, and rubella immunization in seronegative women prior to discharge. As well, updating immunization status most become a routine part of the immigration medical examination.