Objective To investigate the emergence of Aedes albopictus in mosquito-positive small water containers in surveillance sites for dengue fever vector Aedes in Hebei province, China, and to provide scientific data for prevention and control of dengue vector Aedes. Methods Two villages were randomly sampled from the surveillance sites for dengue vector Aedes, one in Mancheng district in Baoding and the other in Yutian county in Tangshan. Four streets in different directions were selected to record mosquito breeding status and their larvae condition in all mosquito-positive small water containers inside and outside the rooms. The mosquito larvae were collected and taken back to the laboratory to be fed for observing and recording the emergence of Ae. albopictus, and analyses were performed on factors that may affect the emergence probability of Ae. albopictus. Results The positive rate of Ae. albopictus in mosquito-positive small water containers was 100% in peak seasons for Ae. albopictus activities in the surveillance sites for dengue vector Aedes in Hebei province, and the constituent ratio was 71.67% for containers containing Ae. albopictus larvae only. There were significant differences in the constituent ratio of mosquito-positive small water containers containing Ae. albopictus only between containers of different characteristics (P<0.05). The probability of larvae emergence into Ae. albopictus was 66.57% for larvae in mosquito-positive containers, but there were no significant differences in the probability of larvae emergence into adult Ae. albopictus between mosquito-positive water containers of different characteristics (P>0.05). Conclusion Aedes albopictus larvae breeding is observed in mosquito-positive water containers of different characteristics in the residential areas in Hebei province, which demonstrates equivalent infestation. Water containers of different characteristics in the pre-warning areas of dengue risk should be completely disposed. The Breteau index and the data on probability of larvae emergence into Ae. albopictus in mosquito-positive water containers can be referred to during prevention and control of dengue vector Aedes to comprehensively evaluate the risk of dengue vector-borne diseases.
GAO Wen, HUANG Gang, HAN Xiao-li, SONG Ji-wen
. An investigation and analysis of the emergence of Aedes albopictus in small water containers in surveillance sites for dengue vector Aedes in Hebei province, China[J]. Chinese Journal of Vector Biology and Control, 2019
, 30(6)
: 648
-652
.
DOI: 10.11853/j.issn.1003.8280.2019.06.012
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