SUPPURATION AND SEPTIC DISEASES 135 



ginosus, found in inflamed and scarlatiniform throats, 

 are said to be indistinguishable morphologically and 

 culturally (Local Government Board Reports, 1907-08, 

 'Garget in Cows'). S. mastitidis only produces a local 

 abscess in animals, however, while S. anginosus produces 

 general symptoms and death. The former produces 

 mastitis in goats, while the latter does not. 



Jordan thinks most of the streptococci in milk are 

 probably descended from saprophytic, not from patho- 

 genic, ancestors (see pp. 221, 222). 



Wright (Lancet, October 30, 1915) describes the most 

 frequent organism in wounds received in action as a 

 streptococcus that, in film preparations of pus, nearly 

 always shows up as a diplococcus. As obtained from agar 

 and broth cultures, the elements of the diplococcus are 

 lancet-shaped and the pair form an angle resembling a 

 circumflex accent. In broth, a few short chains are 

 also formed. Colonies on agar show up very faintly grey- 

 green and when planted closely tend to run together. 

 Growth is much more rapid than with ordinary S. pyogenes, 

 luxuriant cultures being obtained at 37 C. on broth 

 or agar in four or five hours. In normal serum, and on 

 agar when transplanted in blood, it grows out. Wright 

 finds this organism to correspond to the enterococcus of 

 the French authors, and he also regards it as the ordinary 

 streptococcus of faeces (see p. 265). 



Mutch says that in diabetes the duodenum is infested 

 by the S. brevis and that the only other condition in which 

 this abounds in the duodenum is rheumatoid arthritis. 

 Rosenow considers it reasonable to suppose that in man 

 gastric ulcer may be caused by streptococci. Houston 

 describes a case in which phthisis was simulated by a 

 streptococcic infection and in a case of duodenal ulcer 

 he found in the contents of the stomach streptococci and 

 staphylococci, from which a vaccine was made with 

 promising results. Streptococcic infections occur in 

 measles leading to septicaemia, which may prove fatal 

 in the middle or end of the second week. Streptococci 

 are frequent in alveolar abscesses and infected root canals : 

 Gilmer and Moody found many varieties, including a 

 haemolytic streptococcus with a wide zone of haemolysis, 

 S. mucosus (see p. 141) and S. viridans. (S. viridans 

 resembles 8. salivarius, but grows green on bloocl-agar.) 



