CHAPTER X. 
PATHOGENIC BACTERIA. 
THE methods for the study of pathogenic bacteria 
are exactly the same as those already described. 
In certain cases only are special culture-media 
necessary for their growth. Most pathogenic forms 
grow better in the incubator at body-temperature, 
37.5° C. In all cases animal inoculations are 
necessary for the determination of pathogenicity. 
Fic. 57.—Micrococcus aureus, from an agar-agar culture 
(Ginther). 
Great care must be used in handling pathogenic 
cultures in order to avoid accidents. Have at hand 
a solution of corrosive sublimate (1 : 1000) or carbolic 
acid (1: 20), with which to flood any material that 
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