ISSN 1003-8280 CN 10-1522/R 中国疾病预防控制中心 主办
Objective To depict the occurrence and management of the first dengue fever (DF) outbreak in Nanning city in 2014, and analyze the cost-effectiveness of the measures of the prevention and control. Methods Data of dengue cases were collected between June and December in 2014, including the case reports, measures on dengue control and prevention, medical costs, financial resource, etc. The method of cost-effectiveness was used to evaluate the burden of DF outbreak. Results Totally 722 dengue cases were reported between June 13 and December 31 in 2014. The epidemic spread through the whole city, including 8 districts and 5 counties. Source of this outbreak was from Flower and Birds Market of Nanning city, Guangxi. There were 14 839 persons who avoided being infected and ￥49 980 000 being saved because of the emergency measures of mosquito control and breeding source elimination. The ratio of cost-effectiveness was 1:7.32. Conclusion The first local dengue fever outbreak of Nanning city in 2014 has been controlled by reducing the population of Aedes mosquito, and the cost-effectiveness analysis showed prevention and control measures of DF outbreak was effective.
Objective To study the infection of Borrelia burgdorferi among blood donors in Urumqi area. Methods We randomly selected 637 serum samples from blood donors in People's Hospital of Xinjiang Uygur Autonomous Region which were collected from June 2013 to June 2014. All samples were analyzed by IFA to detect the IgM and IgG antibody to B. burgdorferi. Excel 2003 and SPSS 13.0 software were used for data analysis. Results A total of 637 blood donors were tested, 36 cases tested B. burgdorferi IgG positive, infection rate was 5.65%(36/637), 2 cases tested B. burgdorferi IgM positive, recent infection rate was 0.31%(2/637); 601 samples tested negative, percentage was 94.35%(601/637), there was no differences between sexes, ages, nations in B. burgdorferi infection(χ2=0.055, 0.111, 0.044, P=0.814, 0.990, 0.998). Conclusion There were B. burgdorferi infections among blood donors in Urumqi area, suggesting the need to detect the Lyme disease infection in natural epidemic focus of B. burgdorferi, for preventing the infection from spread by blood transfusion.
Objective To provide scientific information for the prediction and control of dengue fever by investigating vector species density and dengue virus infection in the second generation Aedes albopictus in Pingshan district of Shenzhen city. Methods Surveillance on the density of adult Ae. albopictus and larvae in different habitats were conducted by utilizing the methods of mosquito oviposition trap and Breteau index methods from April to August in 2016. Both larvae and eggs were collected and reared to adults in our laboratory. Nucleic acid was extracted and dengue virus was identified with real-time reverse transcriptase polymerase chain reaction(RT-PCR). Results The average mosquito and oviposition positive index(MOI)was 6.19; the park had the highest MOI and Breteau index(BI) with 7.91 and 10.68 respectively among different habitats; while among different months,the highest MOI and BI were in August with 10.28 and 15.42 respectively. A total of 1 190 Ae. albopictus tected negative for dengue virus. Conclusion Dengue virus in Ae. albopictus in Pingshan district was not detected, however, transmitting vectors were widely distributed and the density was high. A risk of local outbreak of dengue fever can be immediate by imported cases. Surveillance, prevention and control of dengue fever should be strengthened.
Objective To investigate the community structure and seasonality of main vectors in Tangshan city in 2015, and to provide the scientific basis for vectors control and prevention of vector-borne diseases during the 2016 International Horticultural Exposition. Methods Light trap, cage trap,mouse trap and glue trap were used to catch mosquitoes, flies, rodents and cockroaches respectively in different urban and rural areas in Tangshan from January to December in 2015. Results The mosquitoes were mainly Culex pipiens pallens and Anopheles sinensis, the average density of mosquitoes was 2.65 per lamp hour, with the predominant species being Cx. pipiens pallens, which accounted for 99.42%. The flies were mainly Musca domestica, Lucilia sericata, Boettcherisca peregrina and Muscina stabulans. The average fly population density was 3.63 per cage, with the predominant species being B. peregrina, which accounted for 46.18%. The rodents were mainly Rattus norvegicus and Mus musculus, the average density of rodents was 0.32%, with the predominant species being R. norvegicus, which accounted for 52.17%. The cockroaches with the predominant species was Blattella germanica, the average density of cockroaches was 0.08 per sticky trap, and the infestation rates was 5.33%. Most mosquitoes and flies prevailed in May; the former became most active in July and the latter in June and September. Rats and cockroaches were observed throughout the year with relatively high density in May for rats and in July for cockroaches. Conclusion The community structure and seasonality of main vectors were preliminarily understood through monitoring to ensure the success of the 2016 World Horticultural Exposition and provide the basic information for vector-borne disease control and prevention.
