TUBERCULOSIS 93 



Beside Koch's work on tuberculosis, there is the 

 whole range of his work on anthrax, wound-infec- 

 tion, cholera, typhoid, rinderpest, malaria, and 

 sleeping sickness. Moreover, he greatly extended 

 the use of solid culture- media, such as gelatin ; and 

 the use of differential stains. These two methods 

 are the very making of bacteriology. 



It is true that he was not infallible : but he 

 rendered memorable services to the world. He 

 discovered and proved the association of tuber- 

 culosis with a definite inmate of the body : it is the 

 very phrase of Pasteur, Tenez, void sa figure. He 

 led everybody to seek methods of shutting off the 

 sources of infection : it is the very method of 

 Pasteur and Lister, the antiseptic and aseptic 

 method. The national crusades against tuber- 

 culosis, every inch of the way, are guided by the 

 knowledge that the tubercular diseases are of the 

 nature of infective diseases. It would be absurd, 

 here, to pretend to give an account of the past 

 thirty years of work on tuberculosis. But none 



einem unbestimmten Etwas, sondern mit einem fassbaren 

 Parasiten zu thun haben, dessen Lebensbedingungen zum 

 grossten Theil bekannt sind und noch welter erforscht wer- 

 den. ... Es mussen vor alien Dingen die Quellen, aus 

 clenen der Irifections-stofF fliesst, so weit es in menschlichen 

 Macht liegt, verschlossen werden." 



* See his Investigations into the Etiology of Traumatic 

 Infective Diseases. Translated by W. Watson Cheyne. 

 London : The New Sydenham Society : 1880. 



