Objective To investigate the distribution and population density of Aedes albopictus in Xuzhou, Jiangsu province, China, and to evaluate the risk of outbreak of dengue fever in Xuzhou. Methods From January to December 2018, Ae. albopictus mosquitos were continuously surveyed by mosquito ovitraps. The differences in mosquito ovitrap index (MOI) between Ae. albopictus in different months, habitats, and regions were analyzed by the χ ² test to observe their seasonal fluctuation in Xuzhou and the variation of their distribution in different habitats and regions. Results According to the surveillance data in 2018, the distribution of Ae. albopictus varied between different months, habitats, and regions. Aedes albopictus began to appear in May, and their density mounted to the peak in August (MOI=64.24), followed by a gradual decline. During mosquito seasons, their density was the highest in the residential areas (MOI=36.33) and showed no significant difference between parks and schools (MOI:28.19 vs 24.62, χ ²=1.722, P=0.107). Aedes albopictus MOI showed significant differences between residential and non-residential areas in June ( χ ²=4.591, P=0.038), September ( χ ²=18.100, P=0.001) and October ( χ ²=3.734, P=0.035). Comparison of MOI of Ae. albopictus in Yunlong, Tongshan, Kaifa, and Gulou districts of Xuzhou in 2018 found significant differences between Yunlong and Kaifa districts ( χ ²=21.010, P<0.01), Kaifa and Gulou districts ( χ ²=19.700, P<0.01), and Kaifa and Tongshan districts ( χ ²=12.500, P<0.01). The MOI in Kaifa district (MOI=41.08) was the highest. Conclusion The monitoring of Ae. albopictus should be strengthened in Xuzhou, particularly in residential areas. Sensitive, scientific, and objective surveillance methods should be adopted for timely detection, and prevention and control of increase in Ae. albopictus density can effectively reduce the risk of the mosquito-borne disease outbreak in Xuzhou.

【Abstract】 Objective To study the difference of Hantavirus genotype among rats at Changchun Longjia international airport. Methods From Apr. 2006 to Mar. 2007, rodents were captured by snap trap (mouse clamp). Samples were detected by direct immunofluorescence technique. The partial M fragments were amplified with nested reverse transcription polymerase chain reaction (RT-PCR) using Hantavirus genotype-specific primers, and its sequence was analyzed. Results There were 195 mice captured, and about 10 mice took the Hantavirus. There were 4 Hantaan viruses and 6 Seoul viruses. Nucleotide sequence homology analysis showed that there was some mutation in the Hantavirus and no found new sub-genotype. Conclusion There are Hantaan viruses and Seoul viruses at Changchun Longjia international airport, which is valuable for the prevention and control of hemorrhagic fever with renal syndrome.