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Malaria surveillance : annual summary 1975

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Malaria surveillance : annual summary 1975
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    In 1975, 447 cases of malaria were reported in the United States. This represents a 38.4% increase compared with the 323 cases reported for a similar period in 1974, and was primarily related to a substantial increase in the number of malaria cases in civilians. Only 17 reported cases (4% of all cases reported in the United States) were in military personnel in 1975, the smallest number since 1959. As in previous years, imported Plasmodium vivax infections were more common than P_. falciparum (61.3% versus 24.4%). In 2 instances, infection was acquired in the United States: in 1 case infection was induced by transfusion and in 1 the disease was transmitted congenitally. Two deaths attributed to malaria were reported in 1975, compared with 6 in 1974. Both deaths occurred in civilians; 1 patient was infected with P. falciparum acquired in Cambodia, and the other had acquired £. malariae malaria by blood transfusion. The P. falciparum malaria death-to-case ratio of 0.9% was lower than that in 1974 (6.4%), but did not differ significantly from the 10-year (1965-1974) ratio of 1.6%.
  • Content Notes:
    I. SUMMARY -- II. TERMINOLOGY -- III. GENERAL SURVEILLANCE INFORMATION -- IV. MILITARY MALARIA IMPORTED FROM VIETNAM -- V. CIVILIAN MALARIA IMPORTED FROM ABROAD -- VI. MALARIA ACQUIRED IN THE UNITED STATES -- VII. MALARIA DEATHS AND COMPLICATIONS IN THE UNITED STATES -- VIII. REPORT FROM THE NATIONAL MALARIA REPOSITORY -- IX. ADDENDUM I. The Prevention of Malaria -- X. ADDENDUM II. The Microscopic Diagnosis of Malaria.
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