464 PATHOGENIC MICROORGANISMS 



Tetanolysin. — Tetanus bouillon contains, besides the "tetano- 

 spasmin" described above which produces the familiar symptoms of the 

 disease, another substance discovered by Ehrlich ^ and named by him 

 "tetanolysin." Tetanolysin has the power of causing hemolysis of 

 the red blood corpuscles of various animals, and is an entirely separate 

 substance from tetanospasmin. It may be removed from toxic broth 

 by admixture of red blood cells, is more thermolabile than the tetano- 

 spasmin, and gives rise to an antihemolysin when injected into animals. 

 For the production, standardization, and use of tetanus antitoxin, see 

 p. 220 et seq. 



1 Ehrlich, Berl. klin. Woch., 1898. 



