148 



MICRO-ORGANISMS AND DISEASE [cHAP. 



Karlinski gives as the result of a large number of observations on 

 purulent matter of man the following list {Centralbl. f. Bad. tend 

 Parasit., VII., No. 4, p. 115) : — 



streptococcus pyogenes and other streptococci ; 1 this great 

 similarity in morphological and cultural characters of most 

 species of streptococci is no justification for assuming that 

 the two are the sarne, and that they are mutually inter- 

 changeable. The streptococcus erysipelatos taken direct 

 from the erysipelatous skin of a man or rabbit (serum 

 squeezed out of the progressive margin), or from cultures 

 on serum, or Agar, broth or gelatine, particularly the first, 

 when inoculated into the skin of the root of the rabbit's ear, 

 produces typical progressive erysipelas : after twenty-four 

 hours there is distinct blush and swelling, starting from about 



^ The streptococcus erysipelatos forms more pronounced chains, even 

 on solid media, than does the streptococcus pyogenes. 



