关键词: 基孔肯雅病毒, 白纹伊蚊, 诱蚊诱卵器

Abstract: Objective To analyze the association between prevalence of Chikungunya fever and Mosq-ovitrap index (MOI) and to investigate the infection with Chikungunya virus (CHIKV) in larval and adult Aedes albopictus. Methods Mosquitoes were collected by mosq-ovitrap and the mosquito density was also determined by Breteau index (BI) during Chikungunya fever outbreak. CHIKV was detected in the Ae. albopictus samples collected in the field by real-time fluorescence PCR and cell culture for isolation. Results Comprehensive emergency control measures were taken for anti-mosquito purpose after the confirmation of Chikungunya fever outbreak. After one week of ergency management, the epidemic situation was effectively controlled, as shown by the fact that both MOI and BI were lower than 5. The collected mosquito samples were divided into 27 groups according to collection time and location, and then CHIKV detection was performed. The results showed that all adult mosquito samples were virus negative, and 3 larval mosquito samples soaked in alcohol were questionably positive, counting for 12.5% of all 24 larval mosquito samples. There were only negative results in the virus detection based on cell culture and isolation. A total of 253 cases were reported in the community with Chikungunya fever outbreak, and the emergency control measures lasted for 22 days.Conclusion As for responding to Chikungunya fever outbreak, mosq-ovitrap is safe, effective, and easy-to-operate for indicating emergency mosquito control, especially for evaluating control efficacy and detecting virus in adult mosquitoes. The infection rate and transmission rate of CHIKV in Ae. albopictus during Chikungunya fever outbreak deserve further study in the future.

Key words: Chikungunya virus, Aedes albopictus, Mosq-ovitrap