PATHOGENIC BACTERIA. 



249 



FIG. 59. 



place, as in the ice-chest. Marmorek undertakes to main- 

 tain or increase the virulence by growing it first in a mix- 

 ture of human blood-serum (or 

 that of the ass or the horse) with 

 bouillon, and then inoculating it 

 into the body of a rabbit, alter- 

 nating these procedures, to obtain 

 a culture of very high virulence. 

 A serum of uncertain value de- 

 rived from an immunized horse 

 or ass and intended to cure strep- 

 tococcus infection, has been pre- 

 pared by Marmorek. 



A number of other sera have 

 been prepared to combat strepto- 

 coccus infection. These have 

 been used for human cases, in- 

 cluding also scarlet fever. The 

 results appear somewhat encour- 

 aging, although still uncertain. 



It is said that streptococci may 

 be agglutinated by serum from 

 animals immunized to the strepto- 

 coccus. 



Coley has recommended a 

 bouillon culture of streptococcus 

 pyogenes (or of erysipelas), in 

 which the bacillus prodigiosus was 

 afterward grown, to be adminis- 

 tered by injection, after steriliza- 



Streptococcus pyogenes, cul- 



ture on agar (slightly en- 



tion of the cultures by heat, in lar ed) 

 cases of inoperable sarcomatous 



tumors. These injections appear in some cases to have ac- 

 complished remarkable and wholly unexplainable cures. 



