93° 



SCHIZOMYCETES 



It may be that S. mitior Schottmiiller, 1903, is the same as S. 

 mitis Andrewes and Horder, iqo6. It has been found in cases of 

 puerperal fever. 



IX. F^CALis Group. 

 Definition. — Streptococcus parasitic in man, facultative anaerobe, 

 growing in broth and upon agar and blood serum without the forma- 

 tion of pigment, and well upon gelatine at 22° C, without producing 

 liquefaction; fermenting glucose, saccharose, lactose, mannitol, 

 and salicin; sometimes rafiinose, but typically not inulin, and gener- 

 ally, but not always, clotting milk; variable as regards neutral red 

 reduction and sulphuretted hydrogen formation, and usually pro- 

 ducing relatively large amount of acidity in glucose media tested 

 quantitatively. 



Remarks. — This is an important pathogenic group in the tropics, 

 being found in all sorts of conditions. Its various strains may be 

 differentiated as follows: — 



A. Glucose, saccharose, lactose, salicin, and mannitol fermented — 



Typical subgroup. 

 I. RafEinose not fermented — S. fcBcalis Andrewes and Horder, 1906. 

 II. Raffinose fermented — S. versatilis Broadhurst, 1915- 



B. Suppression of one of the characters of the typical subgroup or with 



the addition of the fermentation of inulin — Atypical subgroup. 

 I. Raffinose not fermented — Variants of S. fcscalis. 

 II. Raffinose fermented — Variants of 5. versatilis. 



X. Salivarius Group. 



Definition. — Streptococcus parasitic in animals, facultative anae- 

 robe, growing in broth and on agar without pigment or gas forma- 

 tion, with slight or no growth at 22° C. in gelatine which is not 

 liquefied, and capable of fermenting glucose, saccharose, lactose, 

 and rafiinose; may ferment inulin, but not mannitol, and generally 

 capable of clotting milk. Habitat, human saliva, human fseces, 

 bovine and equine faeces. 



Classification. — This group can be divided into a typical sub- 

 group, and an atypical subgroup containing varieties of the typical 

 group, in which there is suppression of some important character, 

 which is not inulin fermentation. 



Typical Subgroup. — Glucose, saccharose, lactose, and raffinose, and at 

 times inulin fermented. 



A. Salicin not fermented : — 



I. Hgemolj^sis marked — 5. anginosus. 

 II. Haemolysis absent — 5. salivarius. 



B. Salicin fermented : — 



I. Haemolysis marked — S. actuosus. 

 II. Haemolysis absent — 5. bovinus. 

 Atypical Subgroup. — Contains varieties of 5. anginosus, S. salivarius, 

 S. actuosus, and S. bovinus, in which there is suppression of some character 

 but as these suppressions are generally only temporary it is not necessary to 

 specially characterize them. 



Remarks. — These streptococci are frequently found in sore throat 

 and other infections in the tropics. 



