THE STREPTOCOCCI 



279 



based on haemolysis and the fermentation of lactose, 

 mannite and salicin, yields a classification as simple and 

 convenient as any. The Americans differentiate the 

 pneumococcus and the Strep, mucosus from the strepto- 

 cocci by Neufeld's bile-solubility test the two former are 

 dissolved by bile, the streptococci are insoluble in this 

 agent. Holman's classification is given in the annexed 

 table : 



Holman's Classification of Streptococci. 



Gram-positive cocci in chains, no capsules, bile insoluble* 

 (+ = fermentation ; = no fermentation.) 



Hcemolytic. Non-hcemolytic. 



+ S. infrequens. S. fcecalis. 



Salicin. 



S. hcemolyticus I. S. non-hcemolyticus I. 



-f- Mannite. 



Salicin. 



8. pyogenes. 



S. anqi 



angtnosus. 



S. miti-t 



S. salivarius. 



Lactose. 



-f- Salicin. 

 I 



S. hcemolyticus II. S. non-hcemolyticus II. 



Mannite. 



I 



Salicin. 



S. hcemolyticus III. S. non-hcemolyticus III. 

 4- 8. equi. S. equinus 



S. subacidus. S. ignavus. 



Broadhurst, Journ. Infectious Diseases, vol. 17, 1915, p. 277 ; Smillie, ibid., 

 vol. 20, 1917, p. 45 ; Barnes, ibid., vol. 25, 1919, p. 47 ; Kendall and others, 

 ibid., p. 189 ; Havens, ibid., p. 315 ; Clawson, ibid., vol. 26, 1920, p. 93 

 Oppenheim, ibid., p. 115. 



