| prevalence of pertussis igg antibodies in children in palermo, italy. | the prevalence of igg antibodies to bordetella pertussis in a sample of 615 1-12-year-old unvaccinated children in palermo was estimated by elisa. the overall prevalence was 56%; it increased from 24% in one to three-year-old children to 67% in 11-12-year-old children (p less than 0.01). igg antibody prevalence was not associated with the father's years of schooling (or 1), nor with the family size (or 1.3; c.i. 95% = 0.8-2.2). for children aged one the three years, serological results showed th ... | 1989 | 2689344 |