Table 1. Findings on 149 patients with suspected acute bacterial meningitis, by district of residence and etiology, North Benin, weeks 9 through 17, 2012.

	Districts, with case counts (weekly incidence per 100,000 population)
Etiology	Cobly	Materi	Natitingou	Nikki	Tanguiéta	Unknown	Total
NmW135*	4 (6.2)	23 (19.9)	8 (7.6)	3 (2.2)	22 (29.1)	–	60
NmX*	6 (9.3)	1 (0.9)	3 (2.9)	–	1 (1.3)	–	11
H. influenzae	–	–	–	–	3 (3.9)	–	3
Negative	19	16	1	–	30	2	68
Data not available on patient	–	–	–	–	5	2	7
Total known etiology	10 (15.5)	24 (20.8)	11 (10.5)	3 (2.2)	26 (34.3)	–	74
Total samples	29	40	12	3	61	4	149

^* Nm = Neisseria meningitidis.