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ARCHIVE H7N9 situation update

22 June 2016, 17:00 hours; Rome

The next update will be issued on 20 July 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: 795 confirmed; 308 deaths (since February 2013)
Provinces/municipalities: Beijing, Shanghai and Tianjin municipalities; Anhui; Fujian; Guangdong; Hubei and Liaoning provinces; Henan; Hunan; Jiangsu; Jiangxi; Shandong; Zhejiang; Guangxi; Guizhou; Jilin; Qinghai; Hubei; Taiwan Province of China; Hong Kong SAR; Macao SAR, Ningxia Hui and Xinjiang Uyghur Autonomous Regions; Sabah (Malaysia); British Columbia (Canada).
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
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 56 human cases in Fujian (28), Jiangsu (12), Zhejiang (12), 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

  • 8 June 2016, Hong Kong SAR: Yan Oi Market in Tuen Mun, where faecal droppings of live poultry had tested positive for H7N9, plans to resume live poultry trade on 24 June 2016 given that follow-up testing did not return any positive results [reference].

Figure 1. Number of positive virological samples from birds or the environment, by province and origin as of 22 June 2016

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


Humans

  • Since the last update (19 May 2016), 9 new human cases have been confirmed in Hebei (3), Jiangsu (2), Guangdong (1) and Liaoning (1) provinces as well as in Tianjin (1) and Beijing (1) municipalities. This is the first time that the virus is detected in Liaoning Province and Tianjin Municipality.
  • 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 22 June 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 22 June 2016

Incidence of officially reported human cases by week, based on onset date
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=52), 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).
  • 8 June 2016, Netherlands: H7N9 LPAI was detected in Hiaure, Friesland Region, on a free-range chicken layer farm (44 630 birds were considered infected and destroyed). Partial sequencing of HA and NA genes showed homology with viruses circulating in wild birds in Europe, suggesting that the virus is not related to the zoonotic H7N9 LPAI circulating in China [Reference 1; Reference 2]. Note: This event will not be captured in FAO’s H7N9 Updates, including map and graphs.

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