An analysis of vector population and density monitoring in elimination and post-elimination of malaria in Hebei Province

doi:10.12140/j.issn.1000-7423.2022.06.019

Abstract

Abstract:

To understand the population, distribution and density changes of malaria vector Anopheles in the early stage of malaria elimination (2011—2019) and the early stage of post-elimination (2019) in Hebei Province, 18 and 25 monitoring points were selected to conduct overnight mosquito trapping surveys in July September 2012 (the first survey) and 2020 (the second survey). The habitats of monitoring points were divided into 4 categories according to whether there were livestock and water sources. The first survey showed that 30 759 mosquitoes were captured and the total average density was 28.48 mosquitoes/(lamp · night), of which An. sinensis accounted for 3.48% (1 070/30 759). The average number of An. sinensis captured in each habitat was 60.43, 10.92, 0.97 and 0.62 respectively (F = 6.38, P < 0.05). An. sinensis were captured in Funing County, Qinhuangdao City, Zunhua City, Tangshan City, Huanghua City, Cangzhou City, Leting County, Tangshan City, Jizhou City, Hengshui City, Pingshan County, Shijiazhuang City, and Laiyuan County, Baoding City. And the number of An. sinensis captured in these cities was 870, 85, 47, 27, 19, 18 and 4, respectively. The highest number of Anopheles mosquitoes was found among mosquitoes captured during late August, which is 259, and the smallest in late September （97）. In the second survey, 14 958 mosquitoes were captured, with a total average density of 13.91 mosquitoes/(lamp·night), of which An. sinensis accounted for 2.12% (317/14 958). An. sinensis was caught only in Class II and III habitats, with an average number of 8.49 and 1.85, respectively (F = 1.68, P > 0.05), which were distributed in Xiong County, with the highest number in September (60.88%, 193/317). The malaria vector in Hebei Province is only An. sinensis. Although the number is small, it persists, and there is still a potential risk of malaria remerging.

Key words: Malaria, Anopheles, Elimination, post-elimination, surveillance, Hebei

CLC Number:

R531.3

FENG Ning-ning, TAO Wei, FENG Tong, ZHEN Su-juan, LI Jun, LIU Hong-bin. An analysis of vector population and density monitoring in elimination and post-elimination of malaria in Hebei Province[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2022, 40(6): 806-809.

Figures/Tables 2

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调查县	各月捕获中华按蚊数/只						合计
调查县	7月上旬	7月下旬	8月上旬	8月下旬	9月上旬	9月下旬	合计
邯郸市
魏县	0	0	0	0	0	0	0
邢台市
临西县	0	0	0	0	0	0	0
邢台县	0	0	0	0	0	0	0
衡水市
冀州市	0	0	5	3	6	5	19
沧州市
黄骅市	0	0	11	8	12	16	47
石家庄市
藁城市	0	0	0	0	0	0	0
平山县	0	0	10	3	2	3	18
保定市
安新县	0	0	0	0	0	0	0
涞源县	4	0	0	0	0	0	4
廊坊市
香河县	0	0	0	0	0	0	0
霸州市	0	0	0	0	0	0	0
唐山市
遵化市	17	9	22	17	14	6	85
乐亭县	0	2	0	0	15	10	27
秦皇岛市
抚宁县	143	167	93	228	182	57	870
张家口市
张北县	0	0	0	0	0	0	0
宣化县	0	0	0	0	0	0	0
承德市
隆化县	0	0	0	0	0	0	0
宽城县	0	0	0	0	0	0	0
合计	164	178	141	259	231	97	1 070