62 IMMUNE SERA. 



with the ciliated tracheal epithelium of oxen. This 

 serum is rapidly destructive for this particular kind 

 of epithelium. In this serum there is formed at 

 the same time a specific haemolytic body, just as m 

 the case of the spermotoxic serum, and for the same 

 reasons. The ciliated epithelium possesses a recep- 

 tor group common to it and to the red blood-cells. 

 It is therefore able to produce an immune body 

 which is made up of two partial immune bodies. 



This anti-epithelial serum is of further interest in 

 that it leads us to hope that eventually we shall be 

 able to produce sera which are cytotoxic for other 

 varieties of epithelial cells, particularly those of 

 pathological origin, as carcinoma. There have, how- 

 ever, been no further contributions to this subject 

 worthy of mention. 



Lindemann, a pupil of Metchnikoff, and Nefe- 

 dieff have treated animals with an emulsion of 

 kidney cells of another species, and have found 

 that a serum was produced which was specific 

 against the kidney cells of the second animal, and 

 which produced an albuminuria in these animals 

 intra vitam. 



In similar fashion, Delezenne and Deutsch have 

 produced a serum specifically cytotoxic for liver 

 cells. 



Neurotoxin. Delezenne and Madame Metchni- 

 koff have injected animals with central-nervous- 

 system substance, and so produced a specific neuro- 

 toxin. They injected clucks intraperitoneally, giv- 



