I04 LABORATORY BACTERIOLOGY 



EXERCISE LIII 



THE EXAMINATION OF SECTIONS OF TISSUE CONTAINING 

 BACTERIA 



157. The preparation of tissues for sectioning and the study 

 of the tissue changes more properly belong to the course in 

 pathology. It is important, however, that one be able to dis- 

 tinguish bacteria in the lesions which they produce. For this 

 reason an exercise is devoted to the study of bacteria in sec- 

 tions of tissues already stained and mounted. These include 

 the various pneumonias, tuberculosis, anthrax, hog cholera, 

 typhoid, septicaemia, etc. 



158. Work for this Exercise. — Examine the sections fur- 

 nished for bacteria and note especially their distribution in the 

 tissues. Make drawings of a few of the bacteria from each 

 preparation. 



Compare the bacteria in the sections with the cover-glass 

 preparations which have been made from cultures and note any 

 differences in their appearance which may be detected. 



