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A Review of Recent Work on Rate of Acquisition and Loss of Hookworms¹

Two general methods of controlling hookworm infections are known. One method consists in prevention of additional infection, the other in treatment of existing infections. The first method resolves itself largely into the improvement of sanitary conditions with consequent elimination of soil pollution, while the latter, to be effective, necessitates the use of mass treatments, i.e., the wholesale treatment of entire communities at a time, usually without individual diagnoses, where the percentage of infected individuals is known to be very high. The first method is universally recognized as the one of choice, and the only method which can be depended upon to bring permanent relief. But simple as it seems in theory, it is no easy matter to induce hundreds of millions of people to change habits which are dignified by countless centuries of use, and to adopt habits which are not only unfamiliar but usually appear obnoxious.

Received November 14, 1934.
¹ Read at the Thirtieth Annual Meeting of the American Society of Tropical Medicine at San Antonio, Texas, November 14, 15 and 16, 1934.