Autor(es): Guo Xiao-Xia, Zhang Ying-Mei, Li Chun-Xiao, Zhang Gui-Lin, Zheng Zhong, Dong Yan-De, Xue Rui-De, Xing Dan, Zhao Tong-Yan

Resumo: Mosquitoes in Habahe County of Xinjiang Uigur Autonomous Region in China are considered a serious nuisance problem to local residents, but little is known of their role in enzootic disease. Therefore, host-seeking behavior - virus detection in mosquitoes were investigated in this study. Adult host-seeking mosquitoes were sampled using the Centers for Disease Control - Prevention (CDC) light traps operated at three locations in June through August 2008. Nine traps were used at each location at 3 different heights (1 m, 3 m, - 5 m). Seven mosquito species from 4 genera were collected by CDC light traps in different habitats. In total, 90,055 mosquitoes were captured, of which Aedes vexans was the most abundant species, comprising 88.02% of all mosquitoes collected. The second most abundant species was Anopheles messese, which comprised about 5.86%. Other species caught were Culex modestus (2.89%), Aedes caspius (1.11%), Coquillettidia richiardii (0.61%), Ae. dorsalis (1.36%), - An. hyrcanus (0.14%). About 93.5% of Ae. vexans individuals were caught in CO2-baited CDC light traps at 1 m above the ground. The highest numbers of Cx. modestus were caught at the highest trap level, 5 m above ground. Overall, significantly more mosquitoes of all species were collected at dusk than at dawn. Based on blood-meal analyses, Ae. vexans - An. messese fed on various vertebrate hosts, whereas Cx. modestus fed on ducks only. From a total of 335 mosquito pools tested, 10 pools of Ae. vexans were found positive for alphavirus. Comparison with the gene database revealed that the alphavirus deoxyribonucleic acid fragment obtained (GenBank accession no. HM160530) was 100% homologous at the nucleotide level to chikungunya virus isolate LK (PB) chik3408, chikungunya virus isolate SGEHICHD122508, - chikungunya virus strain FD080231. The results of this study suggest that ongoing, integrated mosquito - arbovirus surveillance is necessary in this river wetl-.

Palavras-Chave: Aedes vexans; Xingjiang; Arbovirus; Blood meal; Host-seeking

Imprenta: Journal of the American Mosquito Control Association, v. 31, n. 4, p. 329-335, 2015

Identificador do objeto digital: 10.2987/moco-31-04-329-335.1

Descritores: Chikungunya virus - Arbovirus ; Chikungunya virus - DNA ; Chikungunya virus - Pathogenesis ; Chikungunya virus - Proteins ; Chikungunya Virus - Virus ; Chikungunya virus - Epidemiology

Data de publicação: 2015

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