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#Assessment of #risk associated with #influenza A(#H5N8) virus, 17 November 2016 (@WHO)

  Title : #Assessment of #risk associated with #influenza A(#H5N8) virus, 17 November 2016. Subject : Avian Influenza, H5N8 subtype, multi...

30 Nov 2016

#Avian #Influenza #H7N9–#situation #update as of 30 November 2016 (#FAO, edited)

 

Title: #Avian #Influenza #H7N9–#situation #update as of 30 November 2016.

Subject: Avian Influenza, H7N9 subtype, current epidemiological situation.

Source: FAO, full page: (LINK).

Code: [     ][     ]

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Avian Influenza H7N9 situation update as of 30 November 2016

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The next update will be issued on 4 January 2017

 

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:
    • 805 confirmed; 317 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] Province of China;
    • [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

  • 30 November 2016:
    • MoA published the results of the national animal H7N9 surveillance for the month of October.
    • 63,710 serum and 19,299 virological samples were collected from 2,269 locations in 24 provinces.
    • None of the serological or virological samples tested positive for H7 and H7N9, respectively [reference].
  • 28 October 2016:
    • MoA published the results of the national animal H7N9 surveillance for the month of September.
    • 84,808 serum and 23,187 virological samples were collected from 3,596 locations in 26 provinces.
    • 147 sera tested positive for H7 antibodies in Liaoning Province (14 chicken samples from farms in four cities) and Gansu Province (70 chicken samples from farms and 63 from live bird markets in three cities).
    • All virological samples tested negative for H7N9 virus [reference].

 

Figure 1. Number of positive virological samples from birds or the environment, by province and origin as of 30 November 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 October 2016), two new human cases have been reported in Zhejiang and Jiangsu Provinces.
  • 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 30 November 2016

Number of officially reported human cases since February 2013

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|-- Click to enlarge –|

 

Figure 3. Incidence of officially reported human cases by month, based on onset date as of 30 November 2016

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

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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).

FAO’s support to countries

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

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