Table 2. Findings on 149 patients with suspected acute bacterial meningitis, by age group (in years) and etiology, North Benin, weeks 9 through 17, 2012.

Test	<1 yr	1–4 yrs	5–14 yrs	15–29 yrs	30+ yrs	Unknown	Total
NmW135*	5	15	29	3	6	2	60
NmX*	1	4	3	2	–	1	11
H. influenzae	1	–	2	–	–	–	3
Negative	10	25	21	5	2	5	68
Data not available on patient	1	–	4	–	1	1	7
Total known etiology	7	19	34	5	6	3	74
Total	18	44	59	10	9	9	149

^* Nm = Neisseria meningitidis.