The Fate of Some Pathogenic Trypanosomes in Triatoma and Ornithodorus 1

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Abstract
Summary 1. Trypanosoma brucei, Tr. gambiense, and Tr. hippicum survived only four to six days in Triatoma. The majority of the flagellates were found dead after two to four days. At the end of ten days no flagellates were found viable by either microscopic examination or animal inoculation test. 2. Tr. brucei, Tr. gambiense, and Tr. rhodesiense likewise failed to multiply in soft ticks (Ornithodorus turicata). The flagellates remained viable from two to four days, but at the end of ten days all trypanosomes were found dead or disintegrated. The animal inoculation tests were likewise negative for seven days and after. 3. It is concluded that neither Triatoma nor Ornithodorus will play any major role in the transmission of African sleeping sickness, nagana, or murrina.
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