British research chemists have produced a new weapon in the fight against trypanosomiasis, the group of blood parasite diseases transmitted by the tsetse fly. It is claimed that a single treatment with the new drug. "Antrycide," will cure cattle of the two worst forms of the disease, Trypanosoma congolense and Trypanosoma vivax. It is also claimed to have been used successfully against T. brucei in cattle, horses and dogs; T. evansi in camels, and T. simiae in pigs.