1 66 BACTERIOLOGY. 



tremely simple differential diagnosis between 

 the Schweinepest and the French-Algerian 

 Schweineseuche was not made. 



These various affections of swine illustrate 

 in a striking manner the importance of bac- 

 teriology as a means of diagnosis of disease. 

 The German Schweineseuche probably has its 

 true home in the Alps so that its epidemic ex- 

 tension in the year 1895 to Hungary and 

 Servia is not remarkable, since sporadic cases 

 have occurred there for years, although prob- 

 ably confounded previously with anthrax or 

 with swine-erysipelas. The first case in Bo- 

 hemia was observed by Hueppe in the summer 

 of 1895. 



The Pyogenic Bacteria are, strictly speak- 

 ing, the staphy locoed^ which received this name 

 from Ogston because the cocci in the tissues 

 are often disposed in grapelike clusters. In 

 cultures they appear as micrococci which form 

 yellow, orange or white pigment and are con- 

 sequently distinguished as Staphylococcus pyo- 

 genes aureus, citreus or albtis, respectively. 

 They liquefy gelatin and coagulate milk ; they 

 stain by Gram's method. Introduced subcu- 

 taneously into the body of animals in small 

 tubes they exert a positively chemotropic effect 

 upon the white blood-corpuscles, i.e., they 

 attract them. Inoculated directly into ani- 



