Many trypanosomes do not appear to harm their hosts, but a number of species cause serious diseases in humans or domestic animals (see trypanosomiasis ). T. brucei gambiense and T. brucei rhodesiense cause African sleeping sickness and are transmitted by tsetse flies . T. cruzi is the cause of Chagas' disease , prevalent in South and Central America, which affects the nervous system and heart it is transmitted by the bite of assassin bugs . Other species, restricted in distribution to Africa and Asia, cause diseases of horses and cattle. Control measures include elimination or reduction of the insect carrier populations and measures to reduce the likelihood of bites.
Trypanosomes are classified in the phylum Mastigophora of the kingdom Protista .
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
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