194 



CLINICAL BACTERIOLOGY AND H^MATOLOGY 



EXAMINATION BY CULTURAL METHODS 



This is a much more difficult matter. The difficulty arises 

 from the abundant bacterial flora of the skin ; unless the most 

 thorough antiseptic precautions have been taken the results 

 arc absolutely useless. The)- are worse Jthan useless they arc 

 misleading. A case of ulcerative endocarditis, for example, 

 might be due to streptococci, but might be attributed to 



