EQUINE GROUP 



929 



Classification. — By the action upon raffinose and inulin the group 

 may be divided into two subgroups — i.e., a typical, in which these 

 are not fermented, and an atypical, in which one or both are fer- 

 mented. 



A. Raffinose and inulin not fermented and neutral red not reduced — 



Typical subgroup. 

 I. Saccharose fermented — S. ejuinus. 

 II, Saccharose not fermented — Andrewes and Horder, Winslow and 

 Palmer, Broadhurst (A), Fuller and Armstrong. 



B. Raffinose or inulin fermented or neutral red reduced — Atypical sub- 



group. 



We have found 5. equinus Andrewes and Horder, 1906, in a case 

 of septicaemia in the tropics. 



VIII. Erysipelatos Group. 



Definition, — Streptococcus parasitic in animals, aerobe facultative 

 anaerobe, without pigment; does not liquefy gelatine or produce 

 gas; ferments lactose, glucose, saccharose, and salicin, but not 

 mannitol or raf&nose. 



Classification. — The group may be differentiated into strains as 

 follows: — 



A, Colonies on agar large, white, and opaque, at the end of forty-eight hours 



resembling those of an albococcus; milk clotted. Haemolytic action 

 unknown — 5. puerperalis. 



B. Colonies on agar small, translucent, not resembling, at the end of forty- 

 eight hours, those of an albococcus : — 



I. Haemolysis present: — 



[a) Milk clotted :— 



1. Some kind of a capsule present, colonies on agar typical 

 — S. epidemicus. 



2. Capsule absent, growth on agar may be absent or in the 

 form of very fine or at times watery colonies, but 

 typical on ascitic agar — S. equi. 



(&) Milk not clotted 



Capsule absent, colonies on agar typical: — 



1. Found in cases of erysipelas — S. erysipelatos. 



2. Found in dermatitis cupoliformis — 5. tropicalis. 

 II. Haemolysis absent: — 



{a) Milk clotted — S. mitior. 



[b) Milk not clotted— S. mitis. 



S. puerperalis Furneaux-Jordan and Mackay, 1912, was found in 

 twenty-one cases of puerperal fever in England. 



S. equi Schutz, 1888, is the same as S. coryzcB contagiosce equorum 

 Eisenberg, and as S. equi Capelletti-Vivaldi, 1899, and 5. capellettii 

 Chester, 1901, and causes strangles, etc., or adenitis in horses. 



S. erysipelatos Fehleisen, 1883, is the type species of the genus 

 Streptococcus. It is the same as S. pyogenes Rosenbach, 1884, and 

 5. puerperalis Arloing, 1884, and it may be the same as S. ptterperalis 

 Furneaux-Jordan and Mackay, though there are differences. 



S. tropicalis Castellani, 1914, is the cause of Dermatitis cupoli- 

 formis, which is a type of tropical ecthyma (see p. 2034). 



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