Chrysomya megacephala (Fabricuis) belong to Diptera, Calliphoridae, Chrysomyinae, Chrysomya, commonly known as Oriental toilet fly. It is one of the important forensic insects, resource insects and vector insects. This article summarizes the biological features, experimental ecology and feeding of C. megacephala (Fabricuis) and its control measures and application. The focus of research in this field is discussed to guide further study in the future.

【Abstract】 Objective To investigate the influence factors in areas where rabies raged in Guizhou province, and provide the evidence for the establishment of focused intervention measure suitable for the rural areas. Methods A multistage sampling method was used in this study and all the data were analyzed by Excel 2003 after logging data with Epi Data. Results In recent years, the incidence of rabies in Zhenning county was very serious. The incidence rates of rabies in 2005 and 2006 were 6.16/10 thousand and 5.19/10 thousand respectively, which mainly caused by bite of dogs. Because of the large number of the dogs, the injury rate of the crowd was also higher. It was 6.47% in 2006, and there was significant difference between exposure rate of students （10.58%） and that of farmers （5.05%）（χ2＝36.57, P＜0.001）. About 31.40% exposed crowd were not done the medical treatment, and 35.41% exposed crowd without inoculation rabies vaccines, only 4.26% of Ⅲ° exposed crowd with rabies immunoglobulin. Villagers knew less about the knowledge of rabies prevention and control. Conclusion The main factors leading to the rage of rabies were large number of dogs, low immunization rate of the crowd, high exposure rate of the public and low treatment rate of exposed crowd in the investigated districts.

The composition of small animals,the predominant species of rats and the virus-carrying rates were understood through surveillance studies on the natural nidi of HFRS in forest regions in China. The predominant species were Apodemus peninsulae and Clethrionomys rufocanus in forest regions of Chang Bai Mountain, Apodemus agrarius and Apodemus peninsulae in forest regions of Lesser Xing'an Mountains, Clethrionomys rutilus and Clethrionomys rufocanus in forest regions of Artai Mountain, Rattus confucianusin forest regions of SuiYang, Guizhou Province, and Apodemus agrarius in forest regions of Dabie Mountain. The virus carrying rate of the predominant species of rat was rather high. Comparing the primeval forests with exploited forest regions, some agriculture field rats, grass land rats and house rats have already invaded in the latter, while in the former the rats were forest rats. In primeval forests without invasion of non forest rats, HFRS virus antigen-positive rats have not yet been found.