228 PROTOZOAN PARASITISM 



the cat or dog, or unless he was in error in saying that 

 it was like this small coccidium, with which he was, 

 by the way, familiar. 



EIMERIA GUBLERI 



Since Thomson and Robertson (1926) have shown 

 that the three supposed human intestinal species of 

 the genus of coccidia known as Elmer ia, E. wenyoni, 

 E. oxyspora, and E. snijdersi (Dobell, 1919 and 1921), 

 are merely species from fish, ingested and passing 

 through the intestine in oocyst stage, it seems that 

 man's intestine is free of infection by this genus, al- 

 though it is a common one in certain other animals. 



The only instances of Eimeria infection of man re- 

 maining are five liver infections, according to Dobell 

 (1921). 



Gubler made the first report of such an infection 

 in man in 1858 and, although it is not definitely 

 proven that these cases were not really infections 

 with Eimeria stiedae, a common coccidium of the 

 liver of the rabbit, the name of Gubler has been 

 given to this supposed species of man. 



The oocyst of this coccidium of man's liver is the 

 only stage described and it only in immature form. 

 It is of oval shape and about twenty microns in 

 length. 



If it is in reality Eimeria steidae of the rabbit or 

 if it may be compared with that species, it should 

 occur in the epithelial cells of the bile ducts in the 



