The next update will be issued on 3 May 2017
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.
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: 1444 confirmed; 545 deaths (since February 2013).
Number of new findings in birds or the environment since last update (12 April 2017): 66.
Number of new human cases since last update (12 April 2017): 47.
Provinces/municipalities: Beijing, Chongqing, Shanghai and Tianjin Municipalities; Anhui, Fujian, Gansu, Guangdong, Guizhou, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Qinghai, Shandong, Sichuan, Taiwan, Yunnan and Zhejiang Provinces; Hong Kong SAR; Macao SAR, Guangxi, Ningxia Hui, Tibet and Xinjiang Uyghur Autonomous Regions; Sabah (Malaysia); British Columbia (Canada).
Animal/environmental findings: around 2,500 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.
Highly pathogenic virus findings: Out of the 1444 confirmed human cases, H7N9 virus isolates from three cases (two from Guangdong and one from Taiwan Provinces) were found to be highly pathogenic for chickens. The H7N9 highly pathogenic avian influenza virus was detected in a total of 41 poultry or environmental samples (30 chickens, 1 duck and 10 environmental samples) from 23 live bird markets (LBMs) in: Fujian (Longyan City), Guangdong (Dongguan, Guangzhou, Huizhou, Lufeng, Meijiang, Meizhou, Zhongshan Cities and Haifeng County), Guangxi (Guilin City) and Hunan (Chenzhou City) Provinces; and from 3 farms in: Guangxi (Guilin City) and Hunan (backyard in Chenzhou City and a large farm in Yongzhou City [reference]) Provinces.
Map 1. 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 22 human cases in Anhui (2), Beijing (1), Guangdong (1), Guangxi (1), Hebei (2), Hunan (1), Hubei (2), Jiangsu (1), Jiangxi (6), Sichuan (2) and Zhejiang (3) Provinces are currently not known, these cases are therefore not shown on the map.
- 24 April, Fujian and Guangxi provinces reported for the first time the H7N9 HPAI strain in poultry. H7N9 HPAI positive samples were detected in 1 LBM in Fujian and 1 farm in Guangxi, both in chicken samples.
Figure 1. Number of positive virological samples from birds or the environment, by province and origin as of 26 April 2017. Information provided corresponds to both high and low pathogenic H7N9 viruses.
Figure 2. Number of officially reported human cases since February 2013 as of 26 April 2017. Information provided corresponds to both high and low pathogenic H7N9 viruses.
Figure 3. Incidence of officially reported human cases by month, based on onset date as of 26 April 2017. Information provided corresponds to both high and low pathogenic H7N9 viruses.