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Lack of Enzyme Polymorphism in Trypanosoma rangeli Stocks from Sylvatic and Domiciliary Transmission Cycles in Colombia
A. F. Holguín
A. F. Holguín
International Collaboration in Infectious Diseases Research Program, Centro Internacional de Investigaciones Médicas, Tulane University-Colciencias, Apartado Aéreo 5390, Cali, Colombia
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N. G. Saravia
N. G. Saravia
International Collaboration in Infectious Diseases Research Program, Centro Internacional de Investigaciones Médicas, Tulane University-Colciencias, Apartado Aéreo 5390, Cali, Colombia
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A. DÁlessandro
A. DÁlessandro
International Collaboration in Infectious Diseases Research Program, Centro Internacional de Investigaciones Médicas, Tulane University-Colciencias, Apartado Aéreo 5390, Cali, Colombia
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Although Trypanosoma rangeli is biologically and morphologically distinct from Trypanosoma cruzi, these two hemoflagellates are epidemiologically linked. We report the results of enzyme electrophoretic studies of T. rangeli stocks isolated from sylvatic and domiciliary Rhodnius prolixus, and infected humans inhabiting foci in which T. cruzi was sympatrically transmitted. T. rangeli stocks displayed electrophoretically detectable polymorphism for only a single enzyme, isocitrate dehydrogenase (ICD), in contrast with the marked phenotypic heterogeneity previously reported among the T. cruzi stocks. The relatively restricted diversity manifested by stocks from different geographic sites and ecologic habitats may reflect the existence of distinctive biologic or genetic constraints influencing T. cruzi and T. rangeli transmission.
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