Abstract
Conclusions
The following species of trypanosomes were successfully cultivated in the developing chick embryo: rhodesiense, equiperdum, brucei, evansi and hippicum. T. lewisi was cultivated but not very satisfactorily. No change in virulence of these organisms appeared during the time of cultivation. The strain of T. rhodesiense remained arsenic-fast throughout the period of 41 days of cultivation in the chick embryo.
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