114 RELATIONSHIPS OF THE COCCACE^ 



pneumococcus in morphology but failing to form acid 

 from inulin, the other resembling Str. pyogenes in form, 

 but coagulating the inulin-serum. Both morphology and 

 inulin-fermenting power varied somewhat, even in the 

 " typical" forms. All the cultures tested fermented dex- 

 trose, lactose, and saccharose, but about a third of the 

 strains failed to form acid from mannite. 



Longcope and Fox (1905) compared the character- 

 istics of organisms from normal saliva with those obtained 

 from infections supposed to be pneumococcic and strepto- 

 coccic respectively. Sixteen of the strains from pneumo- 

 coccic infections were typical D. pneumonice; one, how- 

 ever, failed to coagulate the inulin-serum medium. Of 

 eleven strains from streptococcic infections, none showed 

 capsules, none fermented inulin, and most showed hemoly- 

 tic action. On agar the colonies were dry and granular, 

 while those of the pneumococci were raised and moist. 

 Of the cultures from the normal throat, nineteen resembled 

 pneumococci, fermenting inulin, tho somewhat slowly, 

 and showing a low virulence. The other sixteen saliva 

 cultures resembled the streptococci in all the characters 

 noted above, tho generally appearing in pairs of lanceolate 

 cells. All the cultures studied stained by Gram. The 

 authors failed to find any constant types of pathological 

 lesion produced by different strains of pneumococci such 

 as Eyre, Leathern, and Washbourn (1906) have described. 



Norris and Pappenheimer (1905), in a study of organ- 

 isms isolated from the mouth and lungs after death, 



