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Malaria surveillance : annual summary 1973
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Malaria surveillance : annual summary 1973
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    In 1973, 216 cases of malaria were reported in the United States. This represents a 64.8% decrease, compared with the 614 cases reported for a similar period in 1972. This decline was due almost entirely to decreasing numbers of military cases imported from Vietnam. In 1973, only 41 cases (19% of all cases reported in the United States) were reported among military personnel, and only 31 (14.3% of all cases) were acquired in Vietnam; the smallest number since 1960. As in previous years imported Plasmodium vivax infections were more common than £. falciparum (53.2% versus 21.3%).

    There were 175 civilian cases of malaria reported in 1973, compared with 160 cases for 1972. In 2 cases, infection was acquired in the United States, in 1 by blood transfusion, and in 1 by congenital transmission. There were 4 malaria deaths reported in 1973 compared with 1 in 1972. All 4 deaths occurred in civilians infected with JP. falciparum malaria. The P. falciparum malaria case fatality ratio of 8.6% was significantly greater than the mean fatality rate for the 10-year period 1963 to 1972 (1.4%).

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