xvi] 



VIBRIO AND SPIRILLUM 



469 



Band xxiv.) has produced relapsing fever in the human 

 subject by inoculation of blood containing the spirilla. 



Metchnikoff {Virchoivs Arcliw, Band cix., 18S7) main- 

 tains that the disappearance of the spirilla from the system, 

 i.e. recovery, is due to phagocytes, that is to say, that the 



Fk;. 1S5. — Er.riou iif Ate inuculatfj) w 



FlGUKE. 



Blood-corpuscles and spirilla. 

 Magnifying power joo. (After Kocli). 



I-D^IIJ SlinWN IK I-RECEDING. 



white cells of the spleen swallow and destroy the spirilla and 

 thus purge the system of them. It is a fact that the spirilla 

 are found enclosed within the white cells of the spleen, but 

 it does not follow that MetchnikofTs view is correct, for 



