Salud Pública de México
Print version ISSN 0036-3634
LANIADO-LABORIN, RAFAEL et al. Prevalence of tuberculosis infection in schoolchildren from Tijuana, Mexico . Salud pública Méx [online]. 1998, vol.40, n.1, pp. 47-52. ISSN 0036-3634. http://dx.doi.org/10.1590/S0036-36341998000100007.
Objective. To determine the prevalence of tuberculosis infection in school children from Tijuana, Mexico. Materials and methods. A study sample was randomly chosen from the municipal school registry and 1 131 elementary and high school children were included. All received one dosis of PPD 5 TU (Mantoux). Subjects with induration ³ 10 mm were considered positive reactors. Results. The overall prevalence of positive reactors was 57%. The proportion of positive reactors was significantly higher among BCG-immunized subjects than in non-immunized individuals (59.7 vs 45.6 % ; p <0.001). Correlation was not significant between age of immunization with BCG and diameter of induration. Conclusions. The prevalence of tuberculosis infection in Tijuana is extremely high; this fact has important implications in the control of tuberculosis in this region.
Keywords : mycobacterium infections; prevalence; child; adolescence; Mexico.