An innovative three-layer strategy in response to a quartan malaria outbreak among forest goers in Hainan Island, China: a retrospective study

Table 2 Malaria vector surveillance and control from 2015 to 2018 under the three-layer strategy

Layer	Vector surveillance (No. of mosquitoes collected)												Vector control^a
	2015			2016			2017			2018			No. of LLINs distributed
	An. minus	An. dirus	An. sinensis	An. minus	An. dirus	An. sinensis	An. minus	An. dirus	An. sinensis	An. minus	An. dirus	An. sinensis	2015	2016	2017	2018
First layer	1	0	154	1	2	687	0	0	679	0	0	196	900	3348	598	490
Second layer	2	18	238	2	19	231	0	34	115	2	21	104	1047	1325	165	113
Third layer	274	19	3200	56	40	2713	22	3	3551	25	0	1272	6783	6003	1724	689
Total	277	37	3592	59	61	3631	22	37	4345	27	21	1572	8730	10,676	2487	1292

LLINs long-lasting insecticide nets
^aInsecticide residual spraying (IRS) data were not shown, and IRS was implemented only in the address of six foci in Sanya

ISSN: 2049-9957