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#Avian #Influenza #H7N9 in #China: Preventing the Next #SARS (@WHO, Apr. 2 ‘17)

  Title : #Avian #Influenza #H7N9 in #China: Preventing the Next #SARS. Subject : Avian Influenza, H7N9 subtype (Asian Lineage), poultry e...

20 Oct 2016

#Avian #Influenza #H7N9, #situation #update as of 20 October 2016 (#FAO, edited)

 

Title: #Avian #Influenza #H7N9, #situation #update as of 20 October 2016

Subject: Avian Influenza, H7N9 subtype; monthly FAO update.

Source: Food and Agriculture Organization (FAO), full page: (LINK).

Code: [     ][     ]

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H7N9 situation update as of 20 October 2016, 17:00 hours; Rome

The next update will be issued on 30 November 2016

 

Disclaimer

Information provided herein is current as of the date of issue. Information added or changed since the last H7N9 situation update appears in red. Human cases are depicted in the geographic location of their report. For some cases, exposure may have occurred in one geographic location but reported in another. For cases with unknown onset date, reporting date was used instead. FAO compiles information drawn from multiple national (Ministries of Agriculture or Livestock, Ministries of Health, Provincial Government websites; Centers for Disease Prevention and Control [CDC]) and international sources (World Health Organization [WHO], World Organisation for Animal Health [OIE]) as well as peer-reviewed scientific articles. FAO makes every effort to ensure, but does not guarantee, accuracy, completeness or authenticity of the information. The designation employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of FAO concerning the legal or constitutional status of any country, territory or sea area, or concerning the delimitation of frontiers.

 

Overview

  • Situation:
    • Influenza A(H7N9) virus with pandemic potential.
  • Country:
    • China; three human cases originated in China and were reported in Malaysia (1) and Canada (2).
  • Number of human cases:
    • 803 confirmed; 316 deaths (since February 2013)
  • Provinces/municipalities:
    • [China]
      • Beijing,
      • Shanghai and
      • Tianjin municipalities;
      • Anhui;
      • Fujian;
      • Guangdong;
      • Hubei and
      • Liaoning provinces;
      • Henan;
      • Hunan;
      • Jiangsu;
      • Jiangxi;
      • Shandong;
      • Zhejiang;
      • Guangxi;
      • Guizhou;
      • Jilin;
      • Qinghai;
      • Hubei;
      • Hong Kong SAR;
      • Macao SAR,
      • Ningxia Hui and
      • Xinjiang Uyghur Autonomous Regions
    • [Taiwan] ;
    • [Malaysia]
      • Sabah;
    • [Canada]
      • British Columbia.
    • Animal/environmental findings:
      • over 2,000 virological samples from the environment, chickens, pigeons, ducks and a tree sparrow tested positive; positives mainly from live bird markets, vendors and some commercial or breeding farms.
    • FAO actions:
      • liaise with China and partners, monitor situation, monitor virus evolution, conduct market chain analysis, risk assessment, surveillance guidance and communication.

 

Map. Human cases and positive findings in birds or the environment

Human cases and positive findings in birds or the environment

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|-- Click to enlarge –|

Note:  Human cases are depicted in the geographic location where they were reported; for some cases, exposure may have occurred in a different geographic location. Precise location of 58 human cases in Fujian (28), Jiangsu (13), Zhejiang (13), Guangdong (1), Hunan (1), Hubei (1), Hebei (1) and Xinjiang (1) are currently not known. These cases are therefore not shown on the map. Imported cases in Canada (2) and Malaysia (1) are also not represented.

 

Situation update

  • Animals
    • 23 September 2016:
      • MoA published the results of the national animal H7N9 surveillance for the month of August.
      • 31,188 serum and 9,377 virological samples were collected from 1,317 locations in 17 provinces.
      • None of the samples tested positive [reference].

 

Figure 1. Number of positive virological samples from birds or the environment, by province and origin as of 20 October 2016

Number of positive virological samples from birds or the environment, by province* and origin

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|-- Click to enlarge –|

 

  • Humans
    • Since the last update (20 September 2016), no new human cases have been reported.
    • For detailed information on human cases, please refer to WHO's Disease Outbreak News.

 

Figure 2. Number of officially reported human cases since February 2013 as of 20 October 2016

Number of officially reported human cases since February 2013

|-- Click to enlarge –|

 

Figure 3. Incidence of officially reported human cases by month, based on onset date as of 20 October 2016

Incidence of officially reported human cases by week, based on onset date

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|-- Click to enlarge –|

Note: For cases with unknown onset dates from wave 1 (n=7), wave 2 (n=2), wave 3 (n=146) and wave 4 (n= 27), reporting dates were used instead.

 

  • Publications
    • In addition to the surveillance findings by MoA and MoH, 1,728 virologically positive samples have also been reported in 12 peer-reviewed articles (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12).
    • A total of 71,920 samples have been collected in these studies since April 2013, of which 1,728 (2.4%) were positive for H7N9 (1,215 environmental samples, 501 chickens, 1 goose and 1 tree sparrow).
    • A case control study was conducted on 85 laboratory-confirmed human cases reported between October 2014 and April 2015 and 334 control cases.
      • Increased risk of A(H7N9) infection was associated with the following:
        • visiting live poultry markets [LPMs] (adjusted odds ratio [aOR]: 6.3),
        • direct contact with live poultry in LPMs (aOR: 4.1),
        • stopping at a live poultry stall when visiting LPMs (aOR: 2.7),
        • raising backyard poultry at home (aOR: 7.7),
        • direct contact with backyard poultry (aOR: 4.9), and
        • having ≥1 chronic disease (aOR: 3.1).
      • This is the first time that raising backyard poultry at home was identified as a risk factor [reference].
  • FAO’s support to countries

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Keywords: FAO; Updates; China; H7N9; Avian Influenza; Human; Poultry.

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