COCCIDIA 577 



Genus Eimeria Schneider {Coccidium Leuckart). Zygote or oocyst 

 produces four spores, each with two sporozoites. Numerous species 

 (Levine and Becker, 1933: Boughton and Volk, 1938; Hardcastle, 

 1943); host specificity (Becker, 1933). 



E. schubergi (Schaudinn) (Fig. 243). In the gut of Lithobius for- 

 ficatus; oocysts spherical, 22-25/* in diameter. 



E. stiedae (Lindemann) {Coccidium oviforme Leuckart) (Fig. 247, 

 d-k). In the epithelium of the bile-duct and liver (with white nod- 

 ules) of wild and domestic rabbits; schizonts ovoid or spherical, 15- 

 18/i in diameter; merozoites 8-10/* long; oocysts ovoid to ellipsoid, 

 often yellowish, micropylar end flattened; mature oocysts 28-40/* 

 by 16-25/*; sporulation in 60-70 hours; heavy infection is believed 

 to be fatal to young animals, which may occur in an epidemic form. 

 Transmission and comparison with E. perforans (Uhlhorn, 1926). 



E. perforans (Leuckart) (Fig. 247, I, m). In the small intestine of 

 rabbits; oocysts with equally rounded ends, 24-30/* by 14-20/*; 

 sporulation in 48 hours at 33°C; the thermal death point of imma- 

 ture oocysts 51°C. (Becker and Crouch, 1931); pathogenic. Other 

 species (Perard, 1925; Becker, 1934). Lund (1950) found 17 per cent 

 of coccidian infection among 1200 faecal specimens collected from 

 23 commercial rabbitries in southern California. 



E. zilrnii (Rivolta). In the gut of cattle; oocystss pherical to ellip- 

 soidal, 12-28/* by 10-20/*; sporulation in 48-72 hours; said to cause 

 diarrhoea. 



E. bovis (Ziiblin) {E. smithi Yakimoff and Galouzo). In the gut of 

 cattle; oocysts 23-34/* by 17-23/*; sporulation in three to five days 

 in shallow dishes, and two weeks in deep dishes (Becker). Develop- 

 ment (Hammond et ah, 1946). 



E. ellipsoidalis Becker and Frye (Fig. 248, a). In the faeces of calf; 

 oocysts ellipsoidal, 20-26/* by 13-17/*; sporulation in 18 days (Becker 

 and Frye, 1929). 



E. cylindrica Wilson. In the faeces of cattle; oocysts cylindrical, 

 19-27/x by 12— 15m; sporulation in two to 10 days. 



E. wyomingensis Huizinga and Winger. In the faeces of cattle; 

 oocysts pyriform, 37-45/* by 26-31/*; spores 19/* by 3/* (Huizinga and 

 Winger, 1942). 



E. faurei Moussu and Marotel (Fig. 247, ri). In the gut of sheep 

 and goat; oocysts ovoid, 20-40 /* by 17-26/*; sporulation in 24-48 

 hours. 



E. arloingi Marotel. In the gut of sheep and goat; oocysts with a 

 cap, ovoid, 25-35/* by 18-25/*; sporulation in three days. 



E. intricata Spiegel. In the gut of sheep and goat; oocysts with 



