CHAPTER XI. 



VARIOUS PATHOGENIC BACTERIA NOT 



ASSOCIATED WITH A SPECIFIC 



CLINICAL DISEASE. 



THERE is a large class of bacteria capable of producing 

 various inflammations or infections that do not follow 

 a constant or even uniform course. Surgically speaking, 

 they are probably the most important group aside 

 from the pus cocci. It is not possible to make many 

 generalizations concerning these organisms. The re- 

 sults of infection with them vary greatly, depending 

 first upon their own virulence and second upon the 

 resistance of their host. Biologically, many of these 

 non-specific germs bear a close relationship to species 

 giving a very definite clinical disease. In the first 

 example, the colon bacillus, this is well illustrated. A 

 certain group of bacteria is spoken of as the typho- 

 colon series. This means that they possess character- 

 istics relating them to one another. Certain members 

 of the series can be separated only by very careful 

 technic, yet they are capable of setting up easily 

 distinguishable affections. 



THE TYPHOCOLON BACILLI. 



The colon bacillus is the common normal inhabitant 

 of animal intestines, particularly of the colon, whence it 

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