[Tuberculosis: current epidemiological-clinical problems].

Tuberculosis (tb) mortality, morbidity and infection prevalence were very high in Belgium and in the other industrialised countries during the previous century, and the first half of this century. Therefore tb was an "export" pathology, especially towards developing countries. At the end of this century tb-epidemiological indices reached very low levels in the Western world, while tb became endemic in several non-Western countries and so it actually has become an "import" pathology.