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China - MOA veterinary bureau responds to a reporter's questions on the prevention and treatment of H7N9 bird flu in poultry (March 9, 2018)

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  • China - MOA veterinary bureau responds to a reporter's questions on the prevention and treatment of H7N9 bird flu in poultry (March 9, 2018)

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    The person in charge of the Ministry of Agriculture's veterinary bureau responded to a reporter's question on the prevention and treatment of poultry H7N9 flu

    Date: 2018-03-09 14:23 Author: Source: Ministry of Agriculture Information Office [font: Tai Zhong small ]Print

      NEEDHAM, Massachusetts, recently, the Ministry of Agriculture issued a "national poultry H7N9 influenza prevention and control guidance ( 2018 - 2020 years)" (hereinafter referred to as "guidance") . The "Guiding Opinions" introduced the current situation of poultry H7N9 prevention and control, put forward the prevention and control targets for 2020 , and put forward clear requirements for the next prevention and control work . The reporter interviewed the head of the Veterinary Bureau of the Ministry of Agriculture on the prevention and control of poultry H7N9 influenza.   
    Reporter: First of all, please introduce the background of the "Guidance Opinion."
    A: At the beginning of 2013 , China first discovered human cases of H7N9 influenza infection, and subsequently found an H7N9 influenza virus infection among poultry in the live poultry market . At that time, H7N9 influenza virus was rarely detected at the breeding stage , and the virus strains that were popular at that time had no pathogenicity or low pathogenicity to poultry. Since 2016 , the H7N9 flu has spread among poultry and has spread to more than 20 provinces. In early 2017 , a mutant strain was found that was highly pathogenic to poultry and led to multiple poultry outbreaks. Based on the changes in the prevention and control situation, the Ministry of Agriculture has carried out extensive national research, opinion solicitation, and repeated argumentation on the basis of piloting immunization in Guangdong and Guangxi. Since the autumn of 2017 , the Ministry of Agriculture has been implementing the national H7N9 influenza immunity in poultry . From the actual effect, comprehensive prevention and control measures such as immunization have effectively controlled the H7N9 flu epidemic of poultry , reduced the infection rate of pathogens, and the situation of prevention and treatment has improved markedly. The monitoring results of the National Avian Influenza Reference Laboratory showed that the positive rate of pathogenic groups of poultry H7N9 flu in autumn and winter 2017 was 1.7% , which was 9.2 % lower than the first half of the year . Poultry H7N9 effective control of influenza, blocking the spread of pathogens from poultry to people, according to the health department of health statistics, 2017 Nian 10Since the beginning of the month, only 3 cases of human infection with H7N9 influenza have been diagnosed in the country . It turns out that the implementation of universal immunization of poultry is timely and correct, and it is effective to give the UN Food and Agriculture ( FAO ) and the World Organization for Animal Health ( OIE full recognition) and other international organizations.
    Since 2013 , in order to do a good job in the prevention and control of poultry H7N9 flu, the Ministry of Agriculture has successively issued the “ Counterfeit H7N9 Influenza Virus Influenza Plan” and other documents to guide local prevention and control efforts. At present, the situation of H7N9 influenza prevention has changed, and some measures formulated in the past need to be adjusted. In order to guide the prevention and control of science in various regions , the Ministry of Agriculture formulated and issued the “Guiding Opinions” on the basis of the “ Counterfeit H7N9 Influenza Plan of the Country.” This will provide comprehensive regulations for the prevention and treatment of poultry H7N9 flu in the next phase .
    Reporter: Please tell us what the "Guidance Opinion" mainly includes.
    A: The "Guidance Opinion" analyzes the current situation of poultry H7N9 influenza prevention and control, defines prevention and treatment goals, prevention and control ideas, and clarifies the main prevention and control measures and safeguard measures. The "Guidance Opinions" proposes that by 2020 , the country as a whole will meet stability control standards, and the parent or above breeder farms, qualified areas, and scaled poultry farms (cities) will have no epidemic or non-immune and non-immune standards. The "Guiding Opinions" made it clear that prevention and control of poultry H7N9 flu should adhere to the principle of prevention, take a comprehensive prevention and control strategy combined with compulsory immunization and culling, and at the same time improve the level of prevention of poultry breeding premises and promote the transformation and upgrading of the poultry industry. Effective prevention mechanism. The “Guiding Opinions” systematically reviewed the prevention and control measures for poultry H7N9 influenza that have been implemented in recent years , and adjusted the situation according to the current situation, further clarifying measures and requirements such as compulsory immunization, quarantine supervision, and management of live poultry markets.
    Reporter: The state implements mandatory immunization against poultry H7N9 flu. What should be noted in the immunization work around the country?
    A: The "Guidance Opinion" clarifies that the state implements mandatory immunization against poultry H7N9 influenza. This is also the key measure for the prevention and treatment of poultry H7N9 influenza. In the implementation of immunization work, we should pay attention to the following issues: First, regulate the development of immunity. The National Compulsory Vaccination Program for Animal Diseases of the Year is basically followed by veterinary departments and animal epidemic prevention agencies throughout the country to carry out immunization work. All localities must formulate implementation plans strictly in accordance with requirements and regulate the development of immunization. What needs special reminder is that all local veterinary departments and animal epidemic prevention entities must not bid for procurement or purchase vaccines other than those prescribed by the State to carry out immunization. We must effectively avoid immunity and ensure immune density and quality.
    The second is to implement the primary responsibility for epidemic prevention. At present, various localities are actively promoting the implementation of compulsory immunization "fighting for first aid" system. We must make full use of this favorable opportunity to encourage the farms to independently carry out immunization and implement the primary responsibility for epidemic prevention. Non-immunized poultry-free flu breeding farms and exporting enterprises that do not require immunization according to the requirements of the importing party may not be immunized after being reported to the provincial veterinary authorities for approval. The third is to do a good job in the supervision of vaccine quality The veterinary department must continue to strengthen supervision over the production, management, and use of vaccines, and guide the monitoring and evaluation of the immune effects so as to ensure the quality of the vaccine and the effectiveness of the immunization.
    Reporter: What are the requirements for mobile bird supervision after compulsory immunization?
    A: Strengthening mobile surveillance is not only an important measure for the prevention and control of poultry H7N9 influenza, but also a breakthrough in the next phase of animal epidemic prevention. On the basis of Announcement No. 2516 of theMinistry of Agriculture , the "Guiding Opinions" further clarified the requirements for the supervision of live poultry movements. It is possible to generalize and implement the two systems. The first is to implement risk control systems . All local veterinary departments should establish a risk control system for live birds to be transferred in. In addition to young birds and breeders, strict restrictions are imposed on the transfer of live birds from high-risk areas and sites.
    The second is to implement the system of inspection and certification prior to dispatch. Inter-provincial transporting live poultry, farms (households) to provide animal disease prevention and control institutions above the county level or have the H7N9 flu laboratory testing qualification issued by the H7N9 flu test report. Poultry farms (households) for transporting poultry before 21 days, according to the provisions of practicing veterinary commission or rural veterinary sample collection, the sample should cover all transporting poultry (chicks avian origin) of the poultry house, each time the number of samples shall not be less than 30 parts , Do a good job of sampling records for future inspections and submit them within 48 hours after sampling . Trans-provincial broiler ducks with a growth cycle of less than 50 days should be required to provide immunization records.
    Animal health supervision agencies must strictly observe the quarantine regulations for live poultry across provinces. Only those that meet the following conditions can issue animal quarantine certificates: For the immune flocks, the H7 subtype influenza antibody is required to have a pass rate of more than 70% or H7N9 etiological test results. Negative; For non-vaccinated flocks, the serological test for H7 subtype influenza is required to be negative or the H7N9 etiological test is negative; for broiler ducks with a growth cycle of less than 50 days, an immunization profile is shown during the immunization period.
    Reporter: In addition to compulsory immunization and mobile surveillance, what measures should be taken to prevent and control poultry H7N9 flu?
    A: To prevent and control poultry H7N9 influenza, we must adhere to the implementation of a comprehensive prevention and control strategy. In addition to immunization and mobile surveillance, we should focus on the following aspects. The first is to continue to strengthen the H7N9 monitoring work. The non-vaccinated birds were mainly serologically monitored, and the immune birds and the poultry with unknown immune background were mainly etiologically monitored. At the same time, increase the monitoring of high-risk sites such as live poultry markets, poultry farms, slaughterhouses, etc. Positive samples should be sent to the National Bird Flu Reference Laboratory for further analysis and research. The second is to cooperate with the live poultry market management. Past experience has shown that the management of live poultry markets is crucial for the prevention and treatment of H7N9 flu. Local veterinary departments must comply with the division of labor requirements and cooperate with related departments to strengthen the management of live poultry markets and promote implementation of the “ 1110 ” system, ie, daily cleaning and disinfection on a weekly basis. , closed on January 1 and stayed overnight. The third is to strengthen emergency response. After the national bird flu reference laboratory or the provincial animal epidemic prevention and control institution detects positive H7N9 flu pathogens, the culprit positive flocks should be culled and innocuously treated; if confirmed as a highly pathogenic H7N9 flu, All birds of the etiological positive site were culled and detoxified, and the culling range was determined based on the evaluation results. In layman's terms, it means “positive etiology is detected and the entire population is culled; pathogens that are highly pathogenic are detected and culled at least, and the scope can be expanded according to the assessment results”. In addition, where there are human cases of infection in the jurisdiction, veterinary departments around the country must cooperate with the health and family planning department to conduct epidemiological surveys of poultry. The fourth is to raise the level of animal epidemic prevention in poultry farms.Poultry farms (households) shall voluntarily report on the transfer of live poultry from across provinces as required, actively improve the breeding methods, improve biosafety protection measures, and do a good job of risk prevention. Encourage qualified areas and farms to carry out regional management and purification work.
    Reporter: As a consumer, what should you pay attention to?
    A: All influenza viruses are generally sensitive to heat. High temperatures can kill viruses. Eating boiled poultry meat products will not cause infection. Consumers must not be arrogant, untrustworthy, or ignorant, and rationally consume poultry products. Purchase quarantine qualified poultry and poultry products from the formal market, supermarkets, and stores, and feel free to eat. At the same time, it is recommended that consumers develop scientific consumption habits. The live poultry market has a wide range of poultry sources, frequent bird movements, and sales of different types of poultry and cages. Consumers are urged to support and coordinate the management of the live poultry market to prevent human infection risks.

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