420 



BUCCAL AMCEB.E 



be replaced by ordinary pus organisms. The pus from wounds in- 

 fected with anaerobes is usually very foul. The most important anae- 

 robe in the discharge from gas gangrene wounds is B. perfringens. 

 The pus from the necrotic center of climatic bubo is sterile. 



It is remarkable how frequently we get pure cultures from abscess material. In 

 purulent material from abdominal abscesses we are apt to obtain mixed cultures, 

 especially the colon bacillus and B. pyocyaneus, in addition to ordinary pus organisms. 



When it is a question between streptococci and pneumococci, it is well to inocu- 

 late a mouse; the capsulated pneumococci at the autopsy make the diagnosis. 



Animal inoculation is also necessary in plague and glanders, and possibly anthrax. 

 When tetanus is suspected, it should be examined for as described under Tetanus. 

 Tuberculosis should also be identified by inoculating a guinea-pig, as well as by acid- 

 fast staining and culture, if there is any doubt as to the nature of the material. 



The black or yellow granules of madura foot, as well as those of actinomycosis, 

 should be examined as recommended in the section on fungi. 



Amoebae, coccidia, and larval echinococci may be found in purulent material, 

 as may also various other animal parasites, as fly larvae, sarcopsyllae, etc. 



The pus from an amoebic abscess of the liver is as a rule sterile when cultured. 



The examination at the time of operation or exploration frequently 

 shows an absence of amoebae as well as of bacteria. Two or three days 

 later amoebae may be found in the pus draining from the abscess cavity. 



Flukes, round worms, and whip worms may as a result of their wandering from 

 the intestinal lumen cause abscesses. 



Serious ulcerations may follow infection with the Guinea-worm. 

 Abscesses of filarial origin are to be thought of. 





