| relationship between bacille calmette-guérin vaccination, mantoux test positivity, and geohelminth infection. | to investigate the potential protective effects of bacille calmette-guerin (bcg) vaccination scar and sensitization to tuberculin against geohelminth infections, we conducted a cross-sectional study among school age children in rural communities in pichincha province in ecuador where bcg vaccination is routinely given at birth. a total of 944 children aged 8-14 years were evaluated for the presence of bcg scars and sensitization to tuberculin, and underwent faecal examination for geohelminth par ... | 2003 | 15259485 |