In the Nile Valley, which teems with many strange forms of lower animal life, lives a terrifying snail. It spreads a parasitic disease, schistosomiasis, which has afflicted Egyptians since the Pharaohs; the parasite's eggs have been found in preserved human viscera 3,000 years old. For the past five years, a hardbitten, stubborn-jawed, 70-year-old U.S. doctor named Claude Heman Barlow has worked mightily to deliver Egyptians from this ancient plague. His specialty: killing snails.
Schistosomiasis, caused by a tiny blood fluke which burrows under the skin of river bathers, causes fever, hives, bladder infection,...