Trypanosome Infections in the Marmoset (Saguinus Geoffroyi) from the Panama Canal Zone

Octavio E. SousaGorgas Memorial Laboratory, P. O. Box 2016, Balboa Heights, Canal Zone

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Gary A. DawsonGorgas Memorial Laboratory, P. O. Box 2016, Balboa Heights, Canal Zone

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From August 1973 through May 1974 a total of 148 marmosets (Saguinus geoffroyi) were examined for blood parasites. Parasites were detected in 93.2% of the monkeys. Direct examination of blood revealed 82.4% infected with trypanosomes; Trypanosoma cruzi was seen in 1.3% of the animals examined, T. minasense in 52.7% and T. rangeli in 25%. However, the use of several diagnostic tests (direct microscopic examination, hemoculture, xenodiagnosis, and animal inoculation) in 15 marmosets revealed T. cruzi in 40%, T. rangeli in 93%, and T. minasense in 87%. The high rate of infection among marmosets suggests that they are important natural hosts of T. cruzi and T. rangeli in the Panama Canal Zone.

Author Notes

Present address: Michigan State University, The Museum, East Lansing, Michigan 48824.

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