| With the constantly deepening of economic globalization, sustaining development of international trade, as well as the increasingly frequent movement of vehicles, cargoes and people, travel and trades have broken the ecologic area limitations of distribution of infectious disease, providing a man-made convenience for the transmission of infectious diseases and vectors, and the international trades have become the main route of transmission for infectious diseases and vectors. According to statistics from the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China (AQSIQ), more than trillions of dollars of products'logistical operations will enter our country through six thousand million vehicles each year, and the annual immigrations from Chinese border ports are more than 200 million.Historically, there are 3 global pandemics of plagues in sea-land trades; in 1930, the imported Anopheles gambiae from Africa has enhanced the prevalence of malaria in Brazil, and caused the pandemics of malaria in South America. Aedes albopictus has imported to Texas, USA from Japan in 1985 and then quickly spread to other states, till 1992, it has spread into more than 20 states., Ae. albopictus has spread into America, Europe, Africa in the next two decades, which become an important public health problem in the world. The extensive spread and prevalence of international infectious diseases, and the emerging infectious diseases, have become a matter of concern for governments around the world, and have brought huge challenges to the frontier quarantine.IHR, adopted in 2005 and formally implemented in 2007, has also been more focused on vector-borne diseases to expand the scope of monitoring vectors, and propose clear requirements for the operators of international vehicles, and the port authorities. In 2008 AQSIQ conducted a case analysis of various imported infectious diseases each port, as a result there were 136 cases of imported infectious diseases, including 85 cases of imported dengue fever and 5 cases of imported chikungunya fever, the vector-borne diseases accounted for 66% of all cases of imported infectious diseases. For recent years, there have been frequent epidemics of vector-borne infectious diseases all over the world, such as dengue fever, malaria, chikungunya fever, yellow fever, etc. For example, according to official statistics of WHO, there were more than 1.17 million persons to be infected with dengue fever in 2008 all over the world, and 801 persons were died, most of countries (regions) with more severe epidemic situation were those from Southeast Asia and Latin America. Among countries with comparable data, there were 11 countries to have a number of patients with dengue fever to be increased on year-on-year basis, and 5 countries at Southeast Asia. In 2008, according to the reporting data statistics from CIQ, more than 8.439 million organism vectors have been captured on the entering vehicle, and the cases of vectors captured account for 46% of the total reporting data.According to the status and demands of prevention and control for imported vector-borne infectious diseases and vectors in the health quarantine system, this study has applied the risk management process and methods of risk identification, analysis and evaluation proposed by AS/NZS 4360 standards to establish a risk analysis system for imported vector-borne infectious diseases and vectors, It is analyzed that the global distribution, invasive vectors, seasonal factors, route of transmission, etc; It is also analyzed that the importing possibility of vector-borne infectious diseases from border ports into our country through means of entering vehicles, cargos, containers, etc, in addition, morbidity and mortality of vector-borne infectious disease are considered in risk analysis., This study has conducted the hazard severity analysis of vector-borne infectious diseases in terms of political factors such as social stability and national reputation. In order to identify and evaluate the risk of imported vector-borne infectious disease on entering vehicles, according to the results, we have determined the focus of monitoring for vectors on entering vehicles, providing relevant information and basis of decision making , guiding the port front-line health and quarantine officers to adopt different quarantine measures for different levels of risk, maximally containing or reducing the hazards of public health events caused by imported vector-borne infectious diseases.The key results of this study are as follows: 1. A risk analysis program has been drafted for the prevention and control of imported vector-borne infectious diseases and vectors at border crossings, in addition, 207 feedback survey tables have been collected from specialists and front-line staff of vectors monitoring labs, and influencing factors as well as weight coefficients have been determined.2. It is evaluated the level of risks of imported vector-borne infectious diseases and vectors through analyzing the risk possibility, and the severity of hazards, as well as adopting matrix analysis for level of risk.3. A risk analysis system has been established for imported vector-borne infectious diseases and vectors within the inspection and quarantine system, integrate the port survey on vectors in port area, dynamic monitoring data of vector-borne infectious diseases and vectors on importing vehicles, as well as international database of outbreak established according to the real-time epidemic status updated by authorities such as WHO and other epidemic information through various channels, thus establishing risk analysis model for vector-borne infectious diseases and vectors, providing reference for decision making on port prevention and control for vector control, on this basis, conducting risk alarming and risk management.
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