The aim of the present study was an approach to the epidemiological status of tuberculosis in the León province. To this end, we studied the morbidity through the EDOs and we carried out two tuberculin surveys during 1988-1989 to assess RAI. The results showed infection prevalences of 1.19 and 1.09 at six years of age for the two study years, respectively, with a RAI between 0.118 and 0.079. We conclude that tuberculosis still is an important health problem. The RAI indicates that our level is that of a developed country. We also discuss the supposed increase in the frequency of tuberculosis.