Navigation Links
Bird flu in live poultry markets are the source of viruses causing human infections

On 31 March 2013, the Chinese National Health and Family Planning Commission announced human cases of novel H7N9 influenza virus infections. A group of scientists, led by Professor Chen Hualan of the Harbin Veterinary Research Institute at the Chinese Academy of Agricultural Sciences, has investigated the origins of this novel H7N9 influenza virus and published their results in Springer's open access journal Chinese Science Bulletin (SpringerOpen).

Following analysis of H7N9 influenza viruses collected from live poultry markets, it was found that these viruses circulating among birds were responsible for human infections. These results provide a basis for the government to take actions for controlling this public health threat. The novel H7N9 influenza virus was identified in China as the agent, that causes a flu-like disease in humans, resulting in some deaths.

A total of 970 samples were collected from live poultry markets and poultry farms located in Shanghai and Anhui Province. Samples analyzed included drinking water, feces, contaminated soil, and cloacal and tracheal swabs. Of these samples, 20 were positive for the presence of H7N9 influenza viruses. All of the positive samples originated from live poultry markets in Shanghai. Of these 20 positive samples, 10 were isolated from chickens, 3 from pigeons, and 7 were from environmental samples.

The complete genome of three H7N9 isolates, from a chicken, pigeon, and environmental sample, was sequenced and deposited into the GISAID database. Genetic analysis of these isolates revealed high homology across all eight gene segments. The analysis of these novel H7N9 influenza virus isolates showed that that the six internal genes were derived from avian H9N2 viruses, but the ancestor of their hemagglutinin (HA) and neuraminidase (NA) genes is unknown.

HA receptor-binding specificity is a major molecular determinant for the host range of influenza viruses. Within the HA protein of novel H7N9 viruses, there was a leucine residue at position 226, which is characteristic of the HA gene in human influenza viruses. This finding implies that H7N9 viruses have partially acquired human receptor-binding specificity.

The authors conclude: "We suggest that strong measures, such as continued surveillance of avian and human hosts, control of animal movement, shutdown of live poultry markets, and culling of poultry in affected areas, should be taken during this initial stage of virus prevalence to prevent a possible pandemic. Additionally, it is also imperative to evaluate the pathogenicity and transmissibility of these H7N9 viruses, and to develop effective vaccines and antiviral drugs so as to reduce their adverse effects upon human health."


Contact: Renate Bayaz

Related biology news :

1. £12 million funding to tackle devastating livestock and poultry viruses
2. Promoting poultry health through diet
3. Appetite genes are key to better diets for poultry, study shows
4. New Market Forecasts Available for Critical Global Biotechnology Testing and Screening Markets: Molecular Diagnostics, Hematology, Clinical Chemistry and Nucleic Acid Testing
5. Markets for PCR, DNA Microarray, DNA Sequencing, Mass Spectrometry and Flow Cytometry to Exceed $50 billion by 2015
6. Aldi Süd supermarkets -- energy-optimized
7. Government Emerges As the Biggest Spender on Biometrics in the SEA and ANZ Markets, Finds Frost & Sullivan
8. Molecular Imaging Agents: Targets, Technology, Markets, and Commercial Opportunities
9. Research and Markets Announces the Release of Multi-Factor Authentication Market - by Model/Type [Two, Three, Four & Five-Factor], Application & Geography - Forecasts (2012 - 2017)
10. Current water resources in Europe and Africa
11. Keck award enables Carnegie Mellon and Stanford to dramatically expand crowdsourced RNA design
Post Your Comments:
(Date:10/29/2015)... BOSTON , Oct. 29, 2015  Connected health ... phenomena driving the explosion of technology-enabled health and wellness, ... his new book, The Internet of Healthy ... apps, sensors or smartphones even existed, Dr. Kvedar, vice ... model of health care delivery, moving care from the ...
(Date:10/27/2015)... 27, 2015 In the present market scenario, ... for various industry verticals such as banking, healthcare, defense, ... growing demand for secure & simplified access control and ... as hacking of bank accounts, misuse of users, , ... as PC,s, laptops, and smartphones are expected to provide ...
(Date:10/26/2015)... October 26, 2015 ... adds Biometrics Market Shares, ... as well as Emerging Biometrics Technologies: ... to its collection of IT and ... . --> ...
Breaking Biology News(10 mins):
(Date:12/1/2015)... 01, 2015 ... the "2016 Europe Cell Surface Markers: ... Competitive Strategies, Opportunities for Suppliers--France, Germany, Italy, ... --> ) has announced ... Cell Surface Markers: Country Volume and Sales ...
(Date:12/1/2015)... ... December 01, 2015 , ... RURO, Inc., a leading LIMS, ... animal colony management software solution, ezColony®, is now available as a subscription-based, cloud-hosted ... , Many organizations are moving to cloud-hosting for LIMS and ...
(Date:12/1/2015)... Dec. 1, 2015 Cepheid (Nasdaq: CPHD ... at the Piper Jaffray Healthcare Conference in ... Company is reaffirming its outlook for the fourth quarter ... addition to discussing longer term business model expectations. ... Officer.  "We continue to be the fastest growing company ...
(Date:12/1/2015)... ... , ... Matthew “Tex” VerMilyea, PhD, HCLD, has joined Texas Fertility Center as ... lab procedures as well as continue his research efforts into the emerging technologies of ... New Zealand to bring home a High Complexity Clinical Laboratory Director named Tex,” says ...
Breaking Biology Technology: