Objective To understand the spatial-temporal distribution of dengue fever epidemics in Shenzhen city, 2014. Methods Geographic information database was established by using the incidence data of dengue fever and demographic data reported. Global indication of spatial autocorrelation, local indication of spatial autocorrelation, and spatial-temporal clustering analysis were conducted with software ArcGIS 10.2 and SaTScan to determine high risk areas of dengue fever. Results The occurrence of local cases had a characteristic of seasonality, mainly occurred in September and October. The spatial aggregation of dengue fever was obvious in Shenzhen city, 2014. The spatial-temporal clustering analysis showed that the most likely clustering was mainly at Southwest districts of Shenzhen city, such as Shekou, Zhaoshang, and Yuehai counties (LLR=44.46, RR=7.30, P<0.001). Conclusion Obvious spatial-temporal clustering of dengue fever distribution was found in Shenzhen city, Attention should be paid to the hot spots in monitoring and early warning to mitigate the transmission.

Objective To investigate mosquito fauna and habitats in the north of Laos and provide evidences for clarification of mosquitoes, prevention of mosquitoes borne diseases and take advantage of biological resources. Methods Seven counties of five provinces in the north of Laos were chosen randomly from August to October in 2014 and 2015. Adult mosquitoes were collected by overnight trapping with ovitrap light and larvae were collected in the different breeding sites. All captured mosquitoes were processed in the lab. Results In total, 5 921 adult mosquitoes and 3 526 larvae were collected from 82 species of 19 subgenera of 15 genera in 3 subfamilies. All captured adult mosquitoes from 37 species of 11 subgenera of 10 genera in 2 subfamilies were collected by overnight trapping with ovitrap light. The predominant species was Culex tritaeniorhynchus(3 925, 66.29%). Besides, collected larvae belonged to 59 species of 17 subgenera of 12 genera in 3 subfamilies. Culex tritaeniorhynchus was still the predominant species(751, 21.30%). In total, 636 larval habitats of seven different environments were investigated. The predominant habitats were bamboo tube and tree hole(162) and wasted tires(153), these three habitats accounted for 49.30%(315/636)in all habitats. Conclusion The mosquito species showed biological richness in the north of Laos. The predominant species was Cx. tritaeniorhynchus, followed by Anopheles argyropus, An. minimus, An. sinensis, Aedes albopictus, Armigeres subalbatus and Ae. aegypti. The diversity and complexity of habitats of larvae were observed. Different mosquito larvae preferred different habitats, but symbiotic phenomenon of various mosquito species commonly existed.

Objective To investigate the community structure and density of small mammals in the natural environment in Mentougou district of Beijing, China and to detect the infection with Yersinia pestis in the mammals. Methods The surveillance was conducted from 2009 to 2011. Small mammals were captured by trap-at-night method. The rodent species were identified, and the capture rate was calculated. Living rodents were captured by cage-trap method, and blood samples were collected from the heart for detection of F1 antibody of Y. pestis. Results A total of 315 small mammals (7 species) were captured in Mentougou district from 2009 to 2011, including 309 mammals (6 species) of the order Rodentia and 6 mammals (1 species) of the order Insectivora. The capture rates of small mammals were 16.60%, 4.62%, and 15.08%, respectively for different year. The three species of rodents with the highest capture rate and constituent ratio were Apodemus peninsulae, Niviventer confucianus, and A. agrarius; the total proportions of the three rodents were 95.18%, 88.89%, and 96.84% from 2009 to 2011. In the serological detection, no Y. pestis F1 antibody was found in 49 blood samples. Conclusion No infection of Y. pestis has been found by serological detection in rodents in Mentougou district of Beijing, and there is no natural foci of plague in this area.

Objective To determine the correlation between the occurrence of Culex tritaeniorhynchus and meteorological factors.  Methods Photocatalytic light traps were used to collect mosquitoes in Nanjing suburbs from August in 2006 to December in 2007. Multivariant stepwise regression was conducted using SPSS 16.0 with mosquito density (Y1), female mosquito density (Y2) as the dependent variables and synchronous meteorological factors, including mean temperature (X1), maximum temperature (X2), minimum temperature (X3), precipitation (X4), mean air pressure (X5), mean relative humidity (X6), mean wind velocity (X7) and sunshine hours (X8), as the independent variables.  Results Cx. tritaeniorhynchus accounted for over 90% in Nanjing suburbs, and female mosquitoes 95%. High density (＞60 individuals per hour) was observed in the period from June to October. Significant linear correlation was present between X3 and the changing trend in mosquito densities, despite insignificant regression link. Most meterological factors were significantly nonlinear correlated with the density of Cx. tritaeniorhynchus. Favorable  results  were  obtained  via  the  following  regression  equations: Y1＝10∧［18.645 Lg（X1＋1）－21.403 Lg（X2＋1）－0.930 X7＋0.104 X8＋2.470］－1，Y2＝10∧［19.051 Lg （X1＋1）－21.994 Lg （X2＋1）－0.945 X7＋0.106 X8＋8.675］－1，R2＞0.8.  Conclusion The occurrence of Cx. tritaeniorhynchus could be forecasted based on the concurrent meteorological factors. This prediction method could be applied to other vectors and relevant diseases.

【Abstract】 Cockroaches are the important vectors. The aim of our paper is to understand the biology and ecology of cockroaches, and analyze the present situation of the damage of cockroaches in China. The investigation finds that the invasive species Blattella germanica has become the dominant species and its damage was increasing in urban in China. A brief review is given on the development of the equipments and methods, their advantages and limitations in the control of cockroaches. Cockroaches also play an important role in the infection and allergy. The research and control of cockroaches in China started one century ago and cockroaches control was a long?term and arduous work as facing the challenge of pesticide resistance and pesticide pollution on environment.  It suggests that it should put the emphasis on environment improvement and chemical control to control cockroach, adding law and regulation control, pesticide control, biological control and genetic control, especially the rotational use of control equipment.