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

Octavio E. Sousa AND Gary A. Dawson

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.

Accepted for publication November 8, 1975.

^* This work was supported in part by Grant No. HE 10689 from the National Heart and Lung Institute, National Institutes of Health, Bethesda, Maryland.

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