552 Protozoa of the Digestive and Urogenital Tracts 



Fig. 11. 4. A-E. Endoliwax nana: amoeboid stage (A); cysts from natu- 

 rally infected monkey (B) and from man (C-E); B, xl830; A, C-E, xl600 

 (after Kessel). F-N. lodamoeba biitschlii: amoboid stage ingesting food 

 through tubular "food-cup" (F), x2400 (after Stabler); small (I), medium 

 (G, H), and large (J) amoeboid stages, periendosomal granules evident in 

 nucleus, xl685 (after Wenrich); binucleate cyst (K), xl600 (after Kessel); 

 cysts with three (possibly four) nuclei (L) and one nucleus (M), xl685 

 (after Wenrich); uninucleate cyst from naturally infected monkey (N), xl900 

 (after Kessel). 



lodamoeba biitschlii 



(Prowazek) Dobell 



This species apparently was described as Entamoeba biitschlii 

 by Prowazek (135) and was later transferred to the genus lodamoeba 

 (45). Occasional use of the name, lodamoeba williamsi, is based upon 

 Prowazek's (134) earlier erection of the species "Entamoeba wiUiamsi" 

 for a mixture of Entamoeba coli and perhaps /. biitschlii. Infections with 

 /. biitschlii have been reported from apes and monkeys (167) as well 

 as man. 



The amoeboid stage (Fig. 11. 4, F-J) measures 4-20[ji, in length. The 

 organism moves slowly, usually with clear blunt pseudopodia. The 

 stained nucleus is 2. 0-3. 5;;, in diameter and contains a central or slightly 



