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欧盟发布2022年3月-6月禽流感概述

放大字体  缩小字体 时间:2022-08-09 11:30 来源:食品伙伴网 作者: 泽夕   
核心提示:2022年8月6日,欧盟食品安全局(EFSA)发布2022年3月-6月禽流感概述。
   食品伙伴网讯  2022年8月6日,欧盟食品安全局EFSA)发布2022年3月-6月禽流感概述。
 
  2022年3月16日至2022年6月10日,28个欧盟/欧洲经济区国家和英国报告了高致病性禽流感(HPAI)疫情的暴发。自上次报告以来,中国报告了4例甲型H5N6、2例甲型H9N2和2例甲型H3N8病毒感染的人类病例,美国报告了1例由HPAI病毒(H5N1)引起的人类感染病例。在欧盟/欧洲经济区,一般人群的感染风险被评估为低,职业暴露人群的感染风险为中低。部分原文报道如下:
 
  The 2021–2022 highly pathogenic avian influenza (HPAI) epidemic season is the largest epidemic so far observed in Europe, with a total of 2,398 outbreaks in poultry, 46 million birds culled in the affected establishments, 168 detections in captive birds, and 2,733 HPAI events in wild birds in 36 European countries. Between 16 March and 10 June 2022, 1,182 HPAI virus detections were reported in 28 EU/EEA countries and United Kingdom in poultry (750), and in wild (410) and captive birds (22). During this reporting period, 86% of the poultry outbreaks were secondary due to between-farm spread of HPAI virus. France accounted for 68% of the overall poultry outbreaks, Hungary for 24% and all other affected countries for less than 2% each. Most detections in wild birds were reported by Germany (158), followed by the Netherlands (98) and the United Kingdom (48). The observed persistence of HPAI (H5) virus in wild birds since the 2020–2021 epidemic wave indicates that it may have become endemic in wild bird populations in Europe, implying that the health risk from HPAI A(H5) for poultry, humans, and wildlife in Europe remains present year-round, with the highest risk in the autumn and winter months. Response options to this new epidemiological situation include the definition and the rapid implementation of suitable and sustainable HPAI mitigation strategies such as appropriate biosecurity measures and surveillance strategies for early detection measures in the different poultry production systems. Medium to long-term strategies for reducing poultry density in high-risk areas should also be considered. The results of the genetic analysis indicate that the viruses currently circulating in Europe belong to clade 2.3.4.4b. HPAI A(H5) viruses were also detected in wild mammal species in Canada, USA and Japan, and showed genetic markers of adaptation to replication in mammals. Since the last report, four A(H5N6), two A(H9N2) and two A(H3N8) human infections were reported in China and one A(H5N1) in USA. The risk of infection is assessed as low for the general population in the EU/EEA, and low to medium for occupationally exposed people.
 
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日期:2022-08-09
 
 
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