ISSN 1003-8280 CN 10-1522/R 中国疾病预防控制中心 主办
Objective To identify the dynamics and distribution of the dengue mosquito population in Kaijiang county, Sichuan province for effective dengue fever control and prevention. Methods The container index of Aedes albopictus mosquitoes was examined at different habitats of Kaijiang county from June to October, 2010. Adult mosquitoes were captured on human baits to calculate the adult mosquito density. Results The average container index of mosquito larvae was 6.25% after investigation of 2639 water containers and 165 positive habitats. This index ranged from 1.65% to 12.07% from June to October with difference between months (χ2=71.50,P<0.01). As for different habitats, the highest index was found in special habitats (38.83%), followed by mountainous woods (18.18%), and farmland (16.53%), while others ranged between 2.40% to 6.69% in other places, with statistically significant differences (χ2=271.89,P<0.01). As for containers, the highest index was found in waste tires (38.83%), while others ranged from 2.03% to 12.77% with statistical differences (χ2=216.05,P<0.01). The overall adult density was 4.47/man-hour, which ranged between 2.67 to 6.50/man-hour from June to October but, there was no statistical difference between months (t=0.09-1.31,P>0.05). The highest density was found in mountainous woods (9.60), followed by farmland (7.40) and special places (5.80), which were obviously higher than those in other environments (1.00-2.00) (t= 2.78-3.64,P<0.05). Conclusion As dengue mosquitoes, Ae. albopictus, were widely distributed in the county, it is important to implement prevention and control measures against the disease.
【Abstract】 Objective To study the population composition and quantity change of rodents in Kaijiang county, Sichuan province, so as to provide basic information for rodent control. Methods The rodents density was investigated by night trapping in the indoors and outdoors. Results The rodent density in the field was higher in 1989-1990 and 1992-1993, reaching about 18.85%-26.57% and steady in 4.21%-14.88%. The rodent density in the indoors was in the peak in 1986 (9.47%), and it was 1.96%-7.26% in other years. The rodent density in the field rodent was higher than that in the indoors. The dominant species were Apodemus agrarius (51.59%), Anourosorex squamipes (27.36%) and Rattus noregicus (18.68%) in the field. However, The dominant species in the indoors were R.norvegicus (64.32%), Mus musculus (26.58%) and An.squamipes (7.99%). The dominant species exchanged in different years. Conclusion The rodent density and its population dynamics were affected by density dependent factor and non?density dependent factor in the field, but that in the indoors was relative to the control of rodent.