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Volume 9, Number 9—September 2003

Research

Aseptic Meningitis Epidemic during a West Nile Virus Avian Epizootic

Kathleen G. Julian*Comments to Author , James A. Mullins†, Annette Olin‡, Heather Peters§, W. Allan Nix†, M. Steven Oberste†, Judith C. Lovchik¶, Amy Bergmann§, Ross J. Brechner§, Robert A. Myers§, Anthony A. Marfin*, and Grant L. Campbell*
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †Centers for Disease Control and Prevention, Atlanta, Georgia, USA; ‡St. Matthew’s School of Medicine, Grand Caymans, British West Indies; §Maryland Department of Health and Mental Hygiene, Baltimore, Maryland, USA; ¶University of Maryland Medical Center, Baltimore, Maryland, USA

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Table 2

Enterovirus meningitis cases by age group, identified at six investigation hospitals, Baltimore, Maryland, summer 2001

Age group
(y) Aseptic meningitis cases % Test-positivea for enterovirus (no. test-positive/no. tested for enterovirus)
<1
12
80 (8/10)
1–10
24
94 (15/16)
11–20
29
50 (11/22)
21–30
11
75 (3/4)
31–40
26
38 (5/13)
41–50
5
33 (1/3)
>50
6
0 (0/2)
All 113 61 (43/70)

aThirty-four (79%) of the 43 enterovirus meningitis cases had a positive viral culture or polymerase chain reaction test result of cerebrospinal fluid (CSF) specimens. Seven cases had negative CSF tests and were only diagnosed by positive viral culture of nasopharyngeal or rectal swab specimens. Two additional cases did not have sufficient CSF available for testing and were diagnosed by positive culture of nasopharyngeal or rectal swab specimens.

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