Objective To investigate the species distribution and breeding habitats of sandflies, and to provide a scientific basis for the risk assessment of sandflies and the formulation of prevention and control strategies for kala-azar. Methods Light traps were used to collect sandflies in different habitats of Sanmenxia, Henan province, China from July to August in 2018. The collected sandflies were frozen before sorting, putting into tubes, and marking. Then fresh samples were randomly selected and dissected for species identification. SPSS 22.0 software was used for statistical analysis. The chi-square test was used to compare the sandfly distribution between groups. Results All counties (cities, districts) in Sanmenxia had kala-azar vector sandflies, and a total of 1 369 sandflies (38.03 sandflies/lamp·night) were collected using the light traps. There was a statistical difference in sandfly distribution between different areas and habitats (χ2=571.957, P<0.001). There was also a statistical difference in sandfly distribution between the three types of habitats (cave dwellings, tile-roofed adobe house, and brick house) (χ2=341.209, P<0.001). The overall sex ratio of sandflies was 2.05:1, with a statistical difference between five habitats (χ2=262.201, P<0.001). Specifically, females accounted for relatively high proportions in human settlements, pigpens, sheepfolds, followed by cowsheds, while males accounted for a relatively high proportion in chicken coop. Via molecular identification, the sandfly species were identified as Phlebotomus chinensis, Sergentomyia khawi, and Se. squamirostris. Conclusion Sandflies are widely distributed in specific rural environment of Sanmenxia. Preventing imported cases and controlling internal vectors, strengthening the comprehensive control in barns, and targeted monitoring and early warning of sandflies in tourism and canine habitats may effectively prevent the recurrence and transmission of kala-azar.
GU Zeng-qi, WU Shu-xing, CUI Fa-zeng, JIA Liang, HUANG Liang, ZHANG Ye
. A bionomic investigation and analysis of sandflies, the vectors of kala-azar, in Sanmenxia, Henan province, China[J]. Chinese Journal of Vector Biology and Control, 2021
, 32(5)
: 590
-593
.
DOI: 10.11853/j.issn.1003.8280.2021.05.016
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