CYTOLYSINS, BACTERIOLYSINS, AND HEMOLYSINS 165 



to carry out, hence is less frequently used. It may be used for the 

 identification of blood-stains. 



Cytotoxins. Antisera have been prepared for a number of 

 different body-cells, as epithelial cells, spermatozoa, and leuko- 

 cytes. Within limits they seem to be specific. It is believed 

 that some pathological conditions in the body are produced by 

 autocytotoxins, substances produced by the body poisonous for its 

 own tissues. 



