[History of tuberculosis: a century after the discoveries of Koch and Forlanini].
A century after the discovery of the etiological agent of tubercolosis, the author remembers the steps of study of the disease. Fracastoro supposed the existence of small bodies, epidemiological studies pointed attention to the transmissibility until 1882, when Koch communicated to the Physiological Society of Berlin that bacteria had been evidenced in biological material of the lungs from tuberculosis patients. The method of coloration of Koch rapidly spread, but no therapy was found. In the same year Forlanini proposed the artificial pneumothorax as cure.