STREPTOCOCCUS LANCEOLATUS. 145 



Surface growth: Verj'- delicate, transparent growth, with 

 even border, faintly glistening (2, iv). 



Agar Streak. — Extremely delicate, transparent, gray- 

 ish-white, faintly glistening, often not sharply outlined 

 from the agar. M^ater of condensation clear, with very 

 little whitish sediment (2, ii). 



Serum Culture. — Slimy, almost transparent growth. 



Ascites-glycerin-agar. — More luxuriant cultures. 

 Those lying superficiallj^ are usually even-bordered, the 

 periphery somewhat padded, and throughout (especially 

 in old colonies) coarsely punctated to mulberry-like. They 

 then resemble old gonorrhea cultures or at times even very 

 young agar cultures of the colon bacillus. 



Bouillon Culture. — Short, straight chains ; sediment 

 light and not holding together (Kurth). 



Milk Culture. — Milk coagulated. This property, ac- 

 cording to Kruse and Pansini, is very rarely absent. In 

 the milk small amounts of acid are formed. 



Potato Culture. — No growth. 



Vitality in Cultures. — Very short duration of life 

 (often only a few days), and even a more rapid lessening 

 of virulence. In bouillon occurs the most luxuriant growth, 

 but it is least durable. 



Resistance to Drying. — In dried blood as long as 

 forty-five days; in dried sputum as long as one hundred 

 and twenty to one hundred and forty da3^s in diffuse light, 

 and nine to twelve hours in direct sunlight. Literature, 

 Germano, Z. H. xxvi, 66. 



Chemical Activities. — Fawitzky isolated three cul- 

 tures, which were able to produce a brick-red pigment 

 (best in bouillon). (Compare Strept. pyogenes.) Fil- 

 tered and devitalized unfiltered cultures contain toxins, 

 but in relatively small amount. In other respects it is 

 like the Strept. pyogenes. 



Occurrence. — (a) Outside the organism : Not found. 



(6) In healthy organisms : Often in saliva. 



(c) In diseased human organism : One of the most im- 

 portant pathogenic varieties. In the most various inflamma- 

 tory processes, especially such as attack mucous and serous 

 membranes, also not infrequently causing suppuration. 

 Especially frequent as the cause of croupous and catarrhal 

 10 



