570 



PESCRIPTION OF SPECIES^ 



Streptococcus cadaveris (Stem- 

 berg). — The description corresponds 

 with that of Streptococcus pyo- 

 genes. 



K [Inoculated in the depth of gela- 

 tine the colonies are said to be 

 larger and more opaque. 



On the surface of agar they form, 

 a thin translucent layer. 



In broth little flocculi develop, 

 composed of chains in which in 

 some cases the elements varied 

 considerably in size. 



They were obtained from the 

 liver in a fatal case of yellow fever. 



Streptococcus coli gracilis 

 (Escherich). — Cocci from '2 to '4 fi. 

 in diam., forming chains composed 

 of from six to twenty elements. 

 Some elements in a chain are irre- 

 gular in form, and show transverse 

 fission. 



The colonies are spherical and 

 sink down in the liquefied gela- 

 tine. 



Inoculated in the depth of gela- 

 tine liquefaction occurs in the track 

 of the needle on the second day, 

 and a white deposit forms at the 

 bottom of the liquid. In about a 

 week the gelatine is completely 

 liquefied. 



On agar there is a very slight 

 growth. 



On blood-serum small scales 

 develop. 



On potato the growth is com- 

 posed of small white prominent 

 colonies. 



Milk is coagulated. 



They were found in the evacua- 

 tions of healthy infants. 



Streptococcus conglomeratus 

 (Kurth). — Cocci and chains, identi- 

 cal with Streptococcus pyogenes. 



They form an adherent film at 

 the bottom of the tube, which is 

 not broken up by agitation. This 

 is observed in other varieties of 

 Streptococcus pyogenes, and is not 

 sufiicient to distinguish it. 



They are pathogenic in mice. 



They were isolated from cases of 

 scarlet fever. 



Streptococcus flavus desidens 

 (Fliigge). — Cocci, diplococci, and 

 short chains. They form yellowish- 



white colonies, which gradually 

 sink down in the gelatine. 



Inoculated in the depth of gela- 

 tine the cocci form china-white, 

 confluent masses in the track of 

 the needle, and on the surface a 

 yellowish-brown sUmy layer. 



They occur in air and in water, 

 and were originally isolated from 

 contaminated cultures. 



Streptococcus giganteus 

 urethrsB (Lustgarten). — Cocci -8 

 to 1 /a in diam., forming chains 

 composed of several hundred 

 elements. In description they 

 correspond with Streptococcus 

 pyogenes. 



They do not grow at the tem- 

 perature of the room. 



Colonies on agar are transparent 

 and iridescent. 



They were isolated from the 

 healthy urethra. 



Streptococcus Havauieusis 

 (Sternberg). — Cocci 6 to "9 /* in 

 diam., forming long chains, com- 

 posed of cocci, in pairs, and oval 

 elements showing transverse divi- 

 sion. 



This streptococcus is probably 

 a variety of Streptococcus pyo- 



They were found in the acid 

 vomit of a yellow-fever patient. 



Streptococcus in contagious 

 mammitis in cows (Nocard and 

 MoUereau). — Cocci spherical or 

 oval, united in long chains. 



Colonies are spherical, granular, 

 pale-yellow, or brownish by trans- 

 mitted light. 



The cocci inoculated in the depth 

 of gelatine produce a granular 

 filament in the track of the 

 needle. 



On the surface of nutrient gela- 

 tine minute spherical colonies are 

 formed, which are bluish by re- 

 flected light. 



Injected into the mammary gland 

 of cows and goats they produce 

 mastitis. 



They were isolated from the milk 

 of cows suffering from contagious 

 mammitis. 



From the description this strepto- 

 coccus appears to be closely related 



