[Comparative ecology of tuberculosis and hanseniasis as they coincide endemically in tropical countries]

The authors discuss the several aspects of the co-sensibilization in the infections produced by M. Tuberculosis and M. hanseniae. Attention is called to Rabello's pioneer works written in 1935 and the subsequent works written by several Argentinian and Brazilian authors. Special emphasis is made to the experimental works in animals by Azulay. The authors discuss the aspects of competitiveness, protection and the crossed granulomatosis answers to the infections.