Stock Photo - British Scientists Conquering Tsetse Fly. New Drug Tests In Africa -- Test tubes containing tsetse flies are held to the rump of a cow so that the flies may feed. The cow suffers no ill effects unless the flies are infected with trypanosomes. British scientists have reported success in months - long experiments with the new drug Antrycide - latest weapon against the sleepy sickness scourge - that may make East Africa one of he largest and most prosperous of the world's cattle areas. Under Dr. B.

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