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Molecular identification of gastric blood source of Culicoides in Ganshui Town, Qijiang, Chongqing, China |
LU Xue, WANG Lin, XU Yuan-yuan, LIU Jiang-xin, DAI Qing-lang, HOU Xiao-hui |
School of Basic Medical Science, Zunyi Medical University, Zunyi 563099, China |
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Abstract This study aimed to use the mitochondrial CO Ⅰ gene of the species to detect the source of gastric blood from the blood-sucking Culicoides, and to study the blood-sucking habits of the midges. The mosquito trap method was used to collect blood-sucking Culicoides in different habitats in the in the Ganshui Town, Qijiang District, Chongqing, China, and to investigate the species composition of blood-sucking Culicoides in the area; at the same time, according to the differences in the mitochondrial CO Ⅰ gene sequence of the possible blood-sucking objects of the blood-sucking objects in the surrounding environment, the species-specific design was designed Using PCR technology to amplify the mitochondrial CO Ⅰ gene of blood meal of blood-sucking midge stomach, by matching the amplified product with the target band size corresponding to different species, detect the source of blood meal of blood-sucking Culicoides stomach. The results showed that the habitats of chicken houses, sheep houses and chicken-duck mixed houses were mainly C. arakawai, accounting for 93.35%, 75.26% and 94.29%, respectively, and the pig houses were mainly C. kinabaluensis, accounting for 69.44%. Through random sampling, PCR detection was performed on 190 full blood-sucking Culicoides gastric blood from 6 types of Culicoides. All 6 types of Culicoides had facultative blood-sucking phenomenon and sucked the blood of 4-6 kinds of animals at the same time. Among them, C. actoni and C. arakawai had the ability to suck the habit of human blood, accounted for 56.52% and 1.39% respectively. Therefore, this study preliminarily confirmed that the mitochondrial CO Ⅰ gene sequence of the species can be used to detect the source of gastric blood from the blood-sucking Culicoides. At the same time, it was found that all six Culicoides were facultative blood-sucking, with various blood-sucking habits and a wide range of blood-sucking objects.
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Received: 12 March 2021
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Fund:Supported by the National Natural Science Foundation of China (No.81802040, No.31960102), and Innovation and Entrepreneurship Training Program for College Students of Zunyi Medical University (No.ZYDC2018003). |
Corresponding Authors:
Hou Xiao-hui,Email:hxh19801122@163.com
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