Objective To investigate the infection rate of ecto-and endoparasite of small mammals in Yunnan province, China. Methods From October 15 to December 16, 2016, small mammals were captured using the trap-day method in the northwestern and southern mountainous areas of Yunnan province. The captured small mammals were identified, followed by surface parasite examination and identification. Parasites were collected from diseased organs and intestines after dissection and then identified morphologically. SPSS 17.0 software was used for statistical analysis. Categorical data were expressed as frequency and percentage. The χ ² test was used to compare the infection rate between groups. Results A total of 766 small mammals, which belonged to 44 species, 18 genera, 8 families, and 5 orders, were captured, with a total density of 12.51%. The predominant species included Eothenomys eleusis, Apodemus draco, A. latronum, Anourosorex squamipes, and Rattus tanezumi. The infection rate of ectoparasites was 22.06%, including 21.67% fleas, 7.83% gamasid mites and 1.83% ticks, respectively. Among them, 27 species (61.36%) were flea-carrying small mammals, 24 species (54.54%) were gamasid mites, and 8 species (18.18%) were tick-carrying small mammals. The infection rate of endoparasites was 12.27%, with 6.66% for Hepatica capillariasis, 6.92% for tapeworms, and 0.26% for other nematodes. The rate of infection with ecto-and endoparasites was relatively high in the small mammals captured between 100 and 3 999 meters above sea level. Conclusion With high density and diverse species of small mammals in some mountainous areas of Yunnan province, the infection rate of ecto-and endoparasites is relatively high, resulting in risks of diseases transmitted from small mammals to humans.

Dengue fever (DF), widely prevalent in the tropic and subtropic regions, is an important infectious disease transmitted by mosquito biting. With the global climatic warming and rapid development of the tourism and transport industry, the geographic distribution of Aedes aegypti as the major vector of DF virus has changed in China, with the variation of its ecological behaviors occurring in response to the measures long taken for mosquito control. Researches on the relationship between Aedes aegypti and the spreading of dengue virus have showed that both the horizontal and the vertical transmissions are the important patterns for Aedes aegypti to save dengue virus. Aedes aegypti is highly susceptible to dengue virus with a high rate of virus infection. This paper reviews the geographic distribution, ecological behaviors and relationship of Aedes aegypti with DF spreading in China.

【Abstract】 Objective To assess the situation and influence factors of insecticide treatment bed net(ITN) in Yunnan malaria endemic areas and provide the measures for generalization of ITN. Methods Cross survey was used among 47 counties of Yunnan malaria endemic areas by multi?stages sampling method. Results There were 8.68% of households with ITN. The use of bed net was influenced by economic status, gender, marriage, education level, attitude to the use of ITN, malaria transmission knowledge and preventive knowledge analyzed by logistic regression analysis. Conclusion It should pay more attention to the population from poor families, woman, single and illiterate during the promotion of ITN. The use of ITN could be promoted by the transmission of malaria transmission route and preventive measures.