Malaria Control in War Areas field bulletin: January 1945.
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Malaria Control in War Areas field bulletin: January 1945.

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      On cover: The Extended Malaria Control Program.

      Large numbers of infected servicemen are returning from some of the most highly malarious areas in the world to become potential carriers of malaria in this country. Some authorities estimate that 2,000,000 or more men will return home to introduce foreign, and possibly more dangerous, strains of malaria parasites, threatening to upset the favorable balance which has held malaria at a very low level in recent years. Without some provision to meet this hazard, a decided increase in malaria in the United States may be expected. The Extended Malaria Control Program has been formulated to prevent this threatened spread of malaria. It proposes an intensive anopheline control campaign those areas where the disease is now endemic and prompt control through mobile units of any explosive outbreaks which may occur elsewhere. Returning carriers will be distributed throughout every State in the Union, but they will be of most concern in those localities where present conditions are optimum for transmission of the disease. Since the very existence of endemic malarious areas implies favorable biological conditions for transmission, our first point of attack should be these endemic zones. Under the proposed program, transmission of the disease should be made so difficult that malaria carriers may return without causing an increase in the, malaria rate or an enlargement of the endemic areas. On the other hand, carriers who return to regions outside these endemic areas may cause greater concern in some states than is actually warranted by past experience. In many of these, the so-called marginal states, the mosquito vector has always been present in considerable numbers, but malaria transmission has been of little or no significance recently. The reasons for this involve a complex of biological and ecological inter-relationships of parasite, host, and vector as well as the development of drainage and a more prosperous economy. In the past. those outbreaks which have occurred have been largely self-limited, and malaria has not persisted to a dangerous degree. If outbreaks should develop in marginal States in spite of these hindrances to transmission, the provisions that have been made for their control will be put in force.

      The Extended Malaria Control Program -- Selection of extended program control areas -- Types of projects -- DDT-- a new weapon in malaria control -- Residual spraying procedures -- Entomological evaluation -- Informational services

      Federal Security Agency, U. S. Public Health Service.

      28 numbered pages

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