Mosquito arbovirus survey in selected areas of Kenya: detection of insect-specific virus

Iwashita, Hanako; Higa, Yukiko; Futami, Kyoko; Lutiali, Peter A.; Njenga, Sammy M.; Nabeshima, Takeshi; Minakawa, Noboru

doi:10.1186/s41182-018-0095-8

Tropical Medicine and Health

Table 3 Summary of mosquitoes collected in the rainy season in East and West Kenya

From: Mosquito arbovirus survey in selected areas of Kenya: detection of insect-specific virus

Study area		East Kenya			East Kenya			West Kenya			West Kenya			West Kenya
Study site		Kwale			Mombasa			Busia			Kakamega (Mukumu)			Kakamega (Isecheno)
Collection methods employed (number of trap sessions)^#		As; 48, BG; 30, CDC; 16, GT; 22			As; 30, BG; 13, CDC; 12, GT; 17			As; 36, BG; 18, CDC; 12, GT; 15			As; 39, BG; 15, CDC; 18, GT; 18			As; 39, BG; 15, CDC; 21, GT; 21
Methods collected mosquitoes (number of trap sessions)^#		As; 42, BG; 25, CDC; 11, GT; 22			As; 28, BG; 12, CDC; 11, GT; 17			As; 36, BG; 17, CDC; 12, GT; 15			As; 34, BG; 13, CDC; 16, GT; 15			As; 20, BG; 8, CDC; 11, GT; 17
Collection period (days)		May 9–12, 2012 (4 days)			May 15–17, 2012 (3 days)			May 25–27, 2012 (3 days)			June 2–4, 2012 (3 days)			June 6–8, 2012 (3 days)
Number of houses		13 houses			13 houses			13 houses			13 houses			13 houses
Species	Physiological status	No. collected	Pool	Positive pool	No. collected	Pool	Positive pool	No. collected	Pool	Positive pool	No. collected	Pool	Positive pool	No. collected	Pool	Positive pool
Aedes sp.	Male				2
Aedes sp.	Unfed	3			2			1						1
Ae. aegypti	Male				2
	Unfed	11	8	0	49	14	1^*	4	8	0	3	3	0	2	2	0
	Gravid	2	8	0	7	14	1^*	6	8	0	1	3	0	1	2	0
An. brumripes	Unfed	1												2
An. funestus	Male							3
	Fed							5
	Unfed							59	7	0
	Gravid							2	7	0
An. gambiae s.l.	Male							22
	Fed	2						37						3
	Unfed	18	3	0				402	34	1	3	4	0	3	3	0
	Gravid							9	34	1	1	4	0
An. garnhami	Fed										1
An. garnhami	Unfed	6
An. parensis	Unfed	1
An. rivulorum	Unfed							4	3	0
An. rivulorum	Gravid										1	1	0
Anopheles sp.	Male	1
	Fed	2
	Unfed	6						2			1
	Gravid													1
Cx. decens	Male													1
Cx. decens	Gravid													1
Cx .quinquefasciatus	Male	355			540			1554			332			38
	Fed	202			351			331			840			79
	Unfed	106	106	0	443	52	1^*	1243	113	52^***	472	46	1^**	53	7	0
	Gravid	1867	106	0	554	52	1^*	906	113	52^***	431	46	1^**	79	7	0
Cx. simpsoni	Unfed							1
Cx. univiittetus	Unfed							1
Culex sp.	Male				3
	Fed	3			1
	Unfed	4			2						1			0
	Gravid	1			1									3
Lutzia	Gravid							2
Others	Male				2
	Unfed	1			15			3
	Gravid							1
Total		2592	117	0	1974	66	2	4598	165	53	2087	54	1	267	12	0

Note: We used only unfed and gravid mosquitoes for the pools to detect arboviruses. Unfed and gravid mosquitoes were separated into each category, but some of them were combined into one pool
^*The pool comprised only gravid mosquitoes
^**The pool comprised only unfed mosquitoes
***Pools consisted of unfed and gravid mosquitoes
^#Abbreviations of “collection methods” are As aspirator, BG BG sentinel trap, CDC CDC light trap, GT CDC gravid trap

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ISSN: 1349-4147

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