Volume 9, Number 9—September 2003
Research
Aseptic Meningitis Epidemic during a West Nile Virus Avian Epizootic
Table 1
Descriptive summary of aseptic meningitis cases with onsets from June 1–September 30, 2001, identified at six hospitals, Baltimore, Marylanda
Cause | Cases | Median age (range) | % <18 y of age | CSF (range) |
|||
---|---|---|---|---|---|---|---|
Median leukocyte count/mL (range) | % PMN pre-dominant | Median protein mg/dL (range) | |||||
All enterovirus meningitis cases |
43 |
9 y
(1 wk–49 y) |
70 |
178 (10–850) |
49 |
48 (10–215) |
|
Echovirus 13 |
15 |
7 y
(1 mo–49 y) |
87 |
132 (11–650) |
80 |
37 (18–97) |
|
Echovirus 18 |
11 |
17 y
(2 mo–35 y) |
55 |
173 (12–409) |
27 |
44 (16–215) |
|
Coxsackievirus B2 |
5 |
19 y
(1 wk–31 y) |
40 |
250 (45–850) |
0 |
87 (57–120) |
|
Echovirus 6 |
2 |
33 y
(31–34 y) |
0 |
330 (130–530) |
50 |
56 (52–59) |
|
Echovirus 30 |
1 |
10 y |
1 |
10 |
0 |
18 |
|
Untyped enterovirus |
9 |
9 y
(1 mo–20 y) |
89 |
178 (43–850) |
56 |
48 (10–153) |
|
Herpes simplex virus meningitis cases |
2 |
39 y
(29–49 y) |
0 |
246 (136–355) |
0 |
128 (77–179) |
|
Lyme meningitis case |
1 |
74 y |
0 |
227 |
0 |
143 |
|
Cases of undetermined cause |
67 |
25 y
(2 wk–67 y) |
39 |
100 (7–1083) |
38b |
53c (19–209) |
|
Total cases | 113 | 18 y (1 wk–74 y) | 50 | 135 (7–1083) | 41d | 53e(10-215) |
aCSF, cerebrospinal fluid; PMN, polymorphonuclear cells.
bN=64.
cN=65.
dN=110.
eN=111.