Encephalitis surveillance annual summary 1976
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Encephalitis surveillance annual summary 1976

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    In 1976 a total of 1,830 cases of encephalitis, resulting in 2k5 deaths, were reported to the Center for Disease Control. The 1976 total is only h2% of the ^,308 cases (including those that occurred in an epidemic of St. Louis encephalitis [SLE]) reported for 1975- Nevertheless, the 1976 total is 8$ higher than the average for the 5 years preceding 1975- Of the 9 geographic divisions in the United States, the East South Central reported the most cases and the highest attack rate. Cases were reported to have occurred in all states except Maine, Montana, New Mexico, Nevada, Vermont, and Wyoming. In 1976, as in each year except 1975, the majority of cases (6l%) were of indeterminate etiology. Most of the other cases (23%) were of arboviral etiology. Of the cases with known etiology, most (6l%) were associated with arboviral infection, primarily SLE. The next largest group of cases with known etiology were associated with childhood infections (25#), including mumps (71 cases), chickenpox (59), measles (UL), and rubella (2). Another major component of cases with determined etiology was associated with herpes simplex infection (10$). The other cases of determined etiology, accounting for less than 3% of the total, were associated with respiratory infection (ll), infectious mononucleosis (U), herpes zoster (3), cytomegalovirus (2), and Rocky Mountain spotted fever (l).

    SUGGESTED CITATION: Center for Disease Control: Encephalitis Surveillance Annual Summary 1976, Issued December 1978

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