Still mesoendemic onchocerciasis in two Cameroonian community-directed treatment with ivermectin projects despite more than 15 years of mass treatment

Table 4 Microfilaria and nodule status across age groups in the present survey of 2015

District	Age categories (years)		Microfilaria status			Nodule status
District	Age categories (years)	N	Mf+ (n)	Weighted prevalence (%)^a	Weighted mean ± SD of mf in carriers	Nod+ (n)	Weighted prevalence (%)^a	Weighted mean ± SD of nodules in carriers
Bafia	5–9	56	19	34.0	20.5 ± 27.7	9	16.1	1.7 ± 0.7
	10–19	94	47	50.0	24.9 ± 47.6	9	9.6	2.2 ± 1.4
	20–29	76	32	41.5	10.9 ± 22.4	12	14.9	2.1 ± 1.1
	30–39	70	28	40.0	13.8 ± 24.0	23	32.5	2.6 ± 2.1
	40–49	69	24	34.7	13.5 ± 24.6	21	30.4	2.6 ± 2.3
	50–59	70	26	37.2	6.6 ± 9.3	17	24.5	2.8 ± 2.0
	60+	79	20	25.4	7.6 ± 12.5	24	30.0	2.5 ± 2.6
	Total	514	196	41.6	17.9 ± 35.5	115	18.1	2.4 ± 1.8
Yabassi	5–9	0	–	–	–	–	–	–
	10–19	14	7	50.0	21.4 ± 21.3	0	0	0
	20–29	35	13	36.6	16.5 ± 29.3	0	0	0
	30–39	47	23	48.9	16.1 ± 26.5	1	2.1	1
	40–49	48	17	35.4	5.1 ± 6.9	3	6.3	1.7 ± 0.6
	50–59	51	28	54.9	11.2 ± 19.4	4	8.0	2 ± 0.8
	60+	47	21	44.7	7.3 ± 12.5	2	4.1	2.5 ± 0.7
	Total	242	109	43.8	14.2 ± 22.6	10	2.7	1.8 ± 0.7

Abbreviations: N number examined, mf microfilaria, Mf+ (n) number with microfilaria positive skin snip, Nod+ (n) number of nodule carriers, SD standard deviation
^aIn each age category, the indices were adjusted on sex; in the total populations, indices were adjusted on sex and age

ISSN: 1756-3305