vni] MICROCOCCI 151 



streptococci in general, inclusive of the streptococcus pyo- 

 genes, although on gelatine its colonies are markedly trans- 

 parent, and it grows much slower than those of streptococcus 

 pyogenes. Cultures injected into the skin of sheep produced 

 a vesicle, and from it the same streptococcus was cultivated. 

 Schottelius described a chain-coccus in foot-and-mouth 

 disease which seems to me indistinguishable from the one 

 which I described. 



7. The streptococcus which I cultivated in a certain per- 

 centage of cases of scarlatina from the blood of patients 

 during the acute febrile stage belongs to this group ; when 

 injected into rodents it produces in a large percentage acute 



1^ 



Fig. 35.— Colonies of Streptococcus of Foot-and-Mouth Disease as seen 

 ON THE Surface of Gelatine under a Magnifying Glass. 



septicsemic infection. That this streptococcus is of a 

 secondary character and capable of producing the purulent 

 and other additional phlegmonous changes indicating 

 secondary infections in scarlatina, as is maintained by 

 several observers, remains to be shown. As far as my obser- 

 vations go, I found the streptococcus in the blood of patients 

 in the early febrile stages of pure scarlet fever in which of 

 secondary infection nothing could be seen. 



The same streptococcus was found in connection with an 

 eruptive (ulcerative) disease on the teats and udder of milch 

 cows at Hendon in 1886, to the consumption of whose 

 milk an extensive outbreak of scarlet fever in the north of 

 London was definitely traced (see Mr. Power's report for 



