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Enterovirus Surveillance -- United States, 1984

Reports received from state virology laboratories for enterovirus isolates identified through May 1984 show echovirus 9 (38 isolates) to be the most commonly reported type of nonpolio enteroviruses thus far this year. The three next most common types are echovirus 7 (20 isolates), echovirus 30 (15 isolates), and coxsackievirus A9 (13 isolates). Coxsackievirus B5, the most common enterovirus type isolated in 1983, is being identified less frequently so far this year (seven isolates reported). One hundred eleven (73.5%) of 151 nonpolio enteroviruses identified in 1984 have been reported from the South Atlantic, West South Central, and Pacific regions. Reported by Respective State Virology Laboratory Directors; Respiratory and Enterovirus Br, Div of Viral Diseases, Center for Infectious Diseases, CDC.

Editorial Note

Editorial Note: A retrospective study of CDC's enterovirus surveillance data from 1970 to 1982 showed that southern and coastal regions in the United States report enterovirus isolates significantly earlier than the rest of the nation and that an enterovirus type isolated four or more times from these regions during March, April, and May is likely to be among the 10 most commonly reported types for the remainder of the year. Reports from March, April, and May received to date suggest that echoviruses 7 and 9 and coxsackieviruses A9, B4, and B5 will be common isolates this year (Table 2). Echovirus 30 was frequently isolated only in January and February.

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