Abstract

AGUILAR A, Román J  and  ALVARADO G, Gilberto. Annual risk of tuberculous infection and its evolutive trend in school children between 6 and 9 years old in Trujillo, Peru. Rev Med Hered [online]. 1996, vol.7, n.2, pp.75-83. ISSN 1018-130X.

Objective: To measure the annual risk of tuberculosis infection (ARTI) and to estimate the evolutive tendency in students of the districts of Trujillo and El Porvenir. Material and methods: An observational, transversal, randomized and prospective study was made in 1324 children from 6 to 9 years old, both sexes of 34 schools, districts and technical team in 1993. All children received 0.1 ml of PPD intracutaneous. The induration was measured 48-72 hours later and considered positive if the diameter was>10 mm. Results: First study: The prevalence of tuberculous infection (PTI) was 6.3% and ARTI 0.93% in the district of Trujillo while in El Porvenir PTI was 9.5% and ARTI 1.27%. Second study: PTI was 5.5% and ARTI 0.78% in the district of Trujillo while in El Porvenir PTI was 6.4% and ARTI 0.81%. The annual disminution of ARTI was estimate in 3% for Trujillo and 7% for El Porvenir. Thus, Trujillo will decrease 50% of its ARTI in 20 years (slow decline), in El Porvenir will ocurr in 10 years (quick decline). Conclusions: The PTI and ARTI were decrease since 1987 to 1993 bur remain high. The annual decrease is quick decline in El Porvenir and slow decline in Trujillo. The tuberculosis problem will persist further the year 2003. (Rev Med Hered 1996; 7: 75-83) +.

Keywords : Prevalence of tuberculosis infection; annual risk of infectious pulmonary tuberculosis; tuberculosis; epidemiology; children.

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