[Prevalence of tuberculosis infection in students in the city of Tijuana, Mexico].
OBJECTIVE
To determine the prevalence of tuberculosis infection in school children from Tijuana, Mexico.


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 doses of PPD 5TU (Mantoux). Subjects with induration > or = 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.
Laniado-Laborín
R
R
Hospital General de Tijuana, Facultad de Medicina-Tijuana, Universidad Autónoma de Baja California, México.
Cabrales-Vargas
N
N
López-Espinoza
G
G
Lepe-Zúñiga
J L
JL
Quiñonez-Moreno
S
S
Rico-Vargas
C E
CE
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D015995:Prevalence; D017678:Sex Distribution; D013334:Students / Q000706:statistics & numerical data*; D014374:Tuberculin Test / Q000706:statistics & numerical data; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology* / Q000276:immunology
Prevalencia de infección tuberculosa en escolares de la ciudad de Tijuana, México.