PROTOZOAN PARASITES OF MONKEYS AND MAN 



2.X 9 



4 nuclei (fig- ih~). Endamoeba nuttalli 

 of Castellani (1908) resembles E. histolytica 

 of mam both in the active trophozoite 

 stage and in the character of its cysts. 

 It seems probable that if E. nuttalli is a 

 species distinct from E. histolytica, then 



of Old World and New World monkeys. 

 The amoebae to which Castellani gave 

 the name E. nuttalli were found by him in 

 a liver abscess in a macaque (Macacus 

 pileatus) in Colombo, Ceylon; and Suldey 

 (19x4) reported typical amoebic dysentery 



Amoebae of Monkeys and Man 



Fig. ia. Endamoeba duboscqi. Active, trophozoite stage of histolytica-type o amoeba from the rhesus 

 monkey, Macacus rhesus. (After Mathis.) 



Fig. ib. Endamoeba duboscqi. Cyst stage containing four nuclei and large chromatoid body. (After Mathis.) 

 Fig. ia. Endamoeba pithed. Active, trophozoite stage of coli-type of amoeba from a monkey. (After Hegner 

 and Taliaferro.) 



Fig. xb. E. -pithed. Cyst stage containing eight nuclei and chromatoid bodies. (After Hegner and Talia- 

 ferro.) 



Fig. 3a. Iodamoeba kueneni. Active, trophozoite stage from a monkey resembling similar stage of Iodamoeba 

 williamsi of man. (After Hegner and Taliaferro.) 



Fig. 3b. Iodamoeba kueneni. Cyst stage from a monkey. (After Hegner and Taliaferro.) 

 Fig. 4a. Endolimax nana. Active, trophozoite stage from man. (After Hegner and Taliaferro.) 

 Fig. 4b. Endolimax nana. Cyst stage from man. (After Hegner and Taliaferro.) All figures drawn at a 

 magnification of about xooo diameters. 



the other four species described from 

 monkeys belong to that species (E. 

 nuttalli). These histolytica-like amoebae 

 have been noted in the gorilla (Wenyon, 

 19x6), chimpanzee (Suldey, 19x4; Des- 

 chiens, 1917), and various other species 



in a three year old captive chimpanzee. 

 Most of the infected monkeys, however, 

 appear to be carriers, that is, the amoebae 

 are present in the intestine, where they 

 grow, multiply and form cysts, but the 

 host-parasite relations are such that symp- 



