PART III. 



SPECIAL BACTERIOLOGY. 



BACTERIA FOUND IN INFLAMMATION AND 

 SUPPURATION. 



NEARLY all bacteria produce under certain conditions inflammation 

 and suppuration. These changes can also be produced by chemical 

 substances acetic acid, ammonia, oil of turpentine, etc., but above 

 all by the products (ptomaines, proteine, etc.) separated from bacteria. 

 The bacteria mostly associated with ordinary inflammatory and 

 suppurative processes are : 



1. The pyogenic cocci, staphylococci, streptococci, pneumococci, 



etc. 



2. The Bacillus coli communis and allied members of that group. 



3. The rarely present Friedlander's pneumobacillus. 



4. Bacillus pyocyaneus. 



STAPHYLOCOCCUS PYOGENES AUREUS. 



Microscopical Appearances. Micrococci from 0-7 to 1-2 p in 

 diameter, usually arranged together like bunches of grapes. (See Photo- 

 micrograph, Plate IV., Fig. 22.) 



Motility. Non-motile. 



Staining Reactions. They are easily stained with all the basic 

 anilin dyes, and by the Gram and Cladius methods. 



Biological Characters. Facultative anaerobe, producing the 

 yellow pigment only in the presence of oxygen. The minimum 

 temperature for their growth is 6 C., maximum 44 C., optimum 34 to 

 38 C. 



On Gelatine Plates. Examined under a low power they form in 

 the beginning round, coarsely granular colonies, of a greyish -white colour, 



