Medicine: Drowsing Death

The white hunters oiled their guns. In the Zulu villages the old men rolled their eyes as they chattered of the slaughter to come—whole herds of galloping zebras and wildebeests to be stalked and shot to stop nagana—native name for a form of African sleeping sickness. Harmless to game animals, nagana is deadly to domestic cattle, with a mortality rate of close to 50%. It is carried by a tsetse fly (Glossina morsitans) closely related to the tsetse (G. palpalis) which infects man.

Last week the South African Government ordered the slaughter of 15,000...

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