Abstract

Epimastigotes of Trypanosoma vespertilionis from diphasic blood agar cultures were on the average longer and the distance between the nucleus and kinetoplast greater than epimastigotes of T. hedricki, T. myoti and T. dionisii. Also, no yellow granules were seen in the epimastigotes of T. vespertilionis whereas they were obvious in the other three species. Long thin trypomastigotes which are characteristic of T. hedricki, T. myoti and T. dionisii cultures were not seen in T. vespertilionis. T. dionisii was much less infective to fibroblasts from mice and did not develop in fibroblasts from chicken, as did T. hedricki and T. myoti. Blood trypomastigotes were seen in chicken embryos inoculated with blood agar cultures of T. hedricki and T. myoti, but none was seen in embryos infected with T. dionisii. The cultural characteristics examined could not be used to differentiate T. hedricki from T. myoti. ac]19810317

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