Colonization of Trypanosoma brucei gambiense within transplanted Ehrlich's tumors of Microtus montanus.

Trypanosoma brucei gambiense has been observed growing in extravascular sites throughout a solid Ehrlich ascites tumor (EAT) in Microtus montanus. These trypanosomes appear in clusters in the tumor. The possible importance of this observation to the host-parasite relationship is discussed.