Update on the distribution of Mansonella perstans in the southern part of Cameroon: influence of ecological factors and mass drug administration with ivermectin

Table 2 Prevalence and mean mf intensity of M. perstans in zones under CDTI for 4–8 years (Bare, Bertoua, Messamena and Nwa)

Ecological zone	Health district/year of survey	CDTI Status	Community	Number examined	Number positive	Prevalence (%)	Geometric mean (mf/ml)
			Mandjibo	67	11	16.4	209.6
			Mbarembeng I	95	4	4.2	62.6
			Mbarembeng II	72	3	4.2	29.2
			Mbie	27	12	44.4	502.6
		4 years	Mounko	67	3	4.5	85.6
DERF	Bare/2010	4 years	Mpaka	73	1	1.4	13.9
			Ndom	103	36	35.0	1,410.3
			Ndouembot	22	17	77.3	15,322.1
			Ndouenke	29	21	72.4	7,965.2
			Nkoniambot	174	51	29.3	314.9
			Nkoniankoniama	19	14	73.7	3,546.0
			Nkounianke	124	29	23.4	912.5
			Total	872	202	23.2	1,116.7
			Bombi	112	82	73.2	4,162.3
			Deng-Deng	105	40	38.1	3,354.1
DHERF	Bertoua/2013	8 years	Kanda	126	33	26.2	5,341.8
			Mbethen 2	112	86	76.8	3,193.2
			Ndemba 1	106	40	37.7	767.8
			Total	561	281	50.1	3,062.6
			Aviation	114	22	19.3	222.5
			Bissoua 2	155	107	69.0	3,758.8
			Doume Village	42	10	23.8	209.4
			Koum	45	26	57.8	898.4
			Labba	34	27	79.4	9,189.4
DHERF	Messamena/2013	8 years	Mayos	74	39	52.7	1,757.1
			Meba	47	35	74.5	2,532.2
			Messamena Village	78	46	59.0	5,275.1
			Nkomzuh	58	31	53.4	1,180.3
			Ntollock	52	14	26.9	75.9
			Soleye	163	83	50.9	1,976.9
			Total	862	440	51.0	2,115.8
			Jator	115	2	1.7	150.0
			Mbiripkwa	137	0	0	0
			Ngomkow	156	1	0.6	316.0
			Ngu	143	0	0	0
FS	Nwa/2013	8 years	Nguri	143	0	0	0
			Nking	108	0	0	0
			Ntem	153	0	0	0
			Nwanti	140	1	0.7	111.4
			Nwat	124	1	0.8	13.9
			Sabongari	110	1	0.9	1,509.8
			TOTAL	1329	6	0.5	175.8

Abbreviations: GS grassland savanna, MFS mosaic forest savanna, FS forested savanna, DERF deciduous equatorial rainforest, DHERF dense humid equatorial rainforest, mf/ml M. perstans microfilariae per millilitre of blood

ISSN: 1756-3305