BACTERIOLOGY IN A NUTSHELL. 



many di^coveries^the germ which is the cause 

 of all forms of ^tuberculosis. This discovery is 

 not only to be considered the greatest of Koch's 

 discoveries, but one of the greatest discoveries 

 of the age, as to tuberculosis, in one or anothei 

 of its forms, is due at least one-sixth of all the 

 deaths which occur yearly in the human family. 

 Had the remedy for this disease, prepared bj 

 Koch,* proven a success, he would have im- 

 mortalized his name in very deed. 



In 1884 Koch made another discovery, 

 namely, the comma bacillus of cholera; so- 

 called because of its peculiar shape. (Pasteui 

 discovered the germ of chicken cholera in 

 Progress 1880.) In 1 884, also, the germ of diphtheria, 



o£ Other called the bacillus diphtherise, was discovered 



by Loeffler, and the bacillus of tetanus, called 

 the bacillus tetani, by Nicolaier. 



The germ which causes "la grippe" was dis- 

 covered in 1892 by Pfeififer. LoefHer, Nico- 

 laier, Pfeiffer, are all of German nationality, 

 (Leudwig Pfeififer, born at Eisenach in 1842. 

 lives at Weimar.) 



In 1894 came the discovery of the bacillus 

 pestis, the germ of the Eastern bubonic plague 

 by Yersin, of France, who was at this time pur- 

 suing his scientific investigations in China. 



Kitasato, a Japanese, working independent!) 



* See Supplement Chap. II, for recent return to con- 

 fidence in tuberculin. 



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