The multiplication stages of Trypanosoma (Herpetosoma) xeri in the liver of the Sudanese ground squirrel Xerus (Euxerus) erythropus.

Blood and organ smears from 24 of 98 ground squirrels (Xerus erythropus) from the Sudan were infected with a trypanosome resembling Trypanosoma (Herpetosoma) xeri. The developmental stages are described from the liver of one heavily infected ground squirrel. Multiplication was by binary fission and numerous triangular amastigotes, sphaeromastogotes and trypomastigotes were observed. A tentative development cycle in the final host is presented.