Dynamics of antigenemia and transmission intensity of Wuchereria bancrofti following cessation of mass drug administration in a formerly highly endemic region of Mali

Table 4 Annual variation of mosquito densities and biting rates over the surveillance period from 2009 to 2012

Collection method	Years	Species	No. of mosquitoes collected	No. of mosquitoes dissected Frequency [95% CI]	ABR	Parity Frequency [95% CI]	Infection Frequency [95% CI]
HLC	2009	GA	4,443	4,375	232	3,671	2
				98.47 [98.05–98.8]		83.9 [82.78–84.98]	0.05 [0.01–0.18]
		FU	5	5	0	4	0
				100 [46.29–100]		80 [29.88–98.94]
		PH	0	0	0	0	0
		RU	0	0	0	0	0
	2011	GA	2,911	2,803	152	2,364	0
				96.29 [95.52–96.93]		84.34 [82.92–85.65]
		FU	3	3	0	3	0
				100 [31.00–100]		100 [31.00–100]
		PH	39	38	2	30	0
				97.44 [84.92–99.87]		78.95 [62.22–89.86]
		RU	9	9	1	9	0
				100 [62.88–100]		100 [62.88–100]
	2012	GA	7,138	5,691	368	5,006	0
				79.82 [78.86–80.74]		88.9 [88.05–89.70]
		FU	3	3	0	3	0
				100 [31.00–100]		100 [31.00–100]
		PH	23	23	1	22	0
				100 [77.08–100]		94.1 [69.23–99.69]
		RU	1	1	0	1	0
				100 [5.46–100]		100 [5.46–100]
PSC	2009		nd	nd	nd	nd	nd
	2011		nd	nd	nd	nd	nd
	2012	An. spp.	1,907	115^a	12^b	nd	0

Abbreviations: An. spp. Anopheles species, HBR human biting rate, HLC human landing catch, FU Anopheles funestus, GA Anopheles gambiae, PH Anopheles pharaoensis, PSC Pyrethrum spray catch, RU Anopheles rufipes, nd not done
^aNumber of pools of 20 mosquitoes tested with the RT-PCR
^bThe number of half gravid and blood fed mosquitoes divided by the number of sleepers in the rooms visited the night before the collection

ISSN: 1756-3305