Navigation Links
Birds of all feathers and global flu diversity
Date:3/6/2014

A group of international scientists have completed the first global inventory of flu strains in birds by reviewing more than 50 published studies and genetic data, providing new insight into the drivers of viral diversity and the emergence of disease that can ultimately impact human health and livelihoods.

The research, published in the journal PLOS ONE and performed as part of the USAID PREDICT project, identified over 116 avian flu strains in wild birds. This is roughly twice the number that were found in domestic birds, and more than ten times the number found in humans. Additionally, an analysis of studies that sampled more than 5,000 birds suggested some regions may have more viral diversity than others.

Avian flu outbreaks come with no warning. In 2013, an H7N9 avian flu strain caused a deadly outbreak in people in China. This surprised virologists, as the strain had never before caused disease in humans. To date, there have been more than 300 clinical cases of H7N9 with a 33 percent mortality rate. This year, another strain known to infect birds, H10N8, has caused human cases for the first time.

As was the case in the H7N9 outbreak, most direct bird-to-human spillover events (when a virus jumps from one species to another) of avian flu can be traced back to human contact with domestic poultry. Although avian flu strain diversity often originates in wild birds, it is the mixing of viruses among poultry, pigs, and people that substantially heightens the disease risk in humans.

In an effort to improve preparedness, scientists are looking to better understand and monitor the diversity of all avian flu viruses not just those known to cause disease. Completing the first global inventory of flu strains in birds is a key step in building that understanding.

"This snapshot of the world of flu virus diversity in birds is the outcome of many years of ecology and evolution, as viewed through the lens of surveillance methods utilized by scientists from around the world," said study lead and Wildlife Conservation Society (WCS) Associate Director of Wildlife Epidemiology, Dr. Sarah Olson.

Understanding the natural diversity of viruses is critically important to identifying health risks. But authorities face a challenge, both in focusing efforts in the right places, and adequately financing surveillance to describe global flu diversity. To address this, the authors introduced a new method, which borrows on approaches used by ecologists, to estimate the diversity of flu viruses in a particular location. With this approach, health authorities can design surveillance programs to detect a given percentage of flu virus diversity.

The scientists also looked at patterns of flu diversity in different bird hosts. Mallards carry the highest number of strains at 89 and ruddy turnstones were second with 45. The more a strain was shared across wild bird types, the more likely it was to be found in domestic birds, a risk factor for spillover events. They also noted that some strains could be specific to certain bird types. For example, gulls and shorebirds (Charadriiformes) carried ten strains that have not been identified in any other bird order.

According to Dr. Olson, "This inventory isn't about blaming wild birds, but it allows us to map what we know, and informs our understanding of what drives viral diversity and the emergence of rare viral strains that can infect people. Given that flu viruses can jump from domestic poultry to people, ongoing efforts at improving biosecurity at poultry farms and markets remain key to outbreak prevention."


'/>"/>
Contact: Scott Smith
ssmith@wcs.org
718-220-3698
Wildlife Conservation Society
Source:Eurekalert  

Related biology news :

1. New study will help protect vulnerable birds from impacts of climate change
2. Not just for the birds: Man-made noise has ripple effects on plants, too
3. UCSB researchers find that less is more, for female cowbirds
4. Hitch-hiking with birds for life
5. Songbirds learning hub in brain offers insight into motor control
6. Scientists find that rain may not always be a welcome thing to waterbirds
7. Restoring streamside forests helps songbirds survive the winter in Californias Central Valley
8. Better looking birds have more help at home with their chicks
9. Seabirds study shows plastic pollution reaching surprising levels off coast of Pacific Northwest
10. Helping family is key for social birds
11. Fossil egg discovered in Lleida (Spain) links dinosaurs to modern birds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Birds of all feathers and global flu diversity
(Date:2/8/2017)... Feb. 7, 2017 Report Highlights ... 2021 from $8.3 billion in 2016 at a compound ... 2021. Report Includes - An overview of the ... trends, with data from 2015 and 2016, and projections ... Segmentation of the market on the basis of product ...
(Date:2/3/2017)... , Feb. 3, 2017  Texas Biomedical Research Institute announced ... Larry Schlesinger as the Institute,s new President and ... effective May 31, 2017. He is currently the Chair of ... the Center for Microbial Interface Biology at Ohio State University. ... the new President and CEO of Texas Biomed," said Dr. ...
(Date:2/1/2017)... IDTechEx Research, a leading provider of independent ... availability of a new report, Sensors for Robotics: Technologies, Markets ... ... ... IDTechEx Report "Sensors for Robotics: Technologies, Markets and Forecasts 2017-2027: Machine ...
Breaking Biology News(10 mins):
(Date:2/17/2017)... , Feb. 17, 2017  If only one ... had a mutation-conferring resistance to chemotherapy, thousands of ... research has focused on finding these mutations in ... from circulating tumor DNA in blood — to ... therapeutics. Unfortunately, however, detecting these genetic ...
(Date:2/16/2017)... 2017  ImMAGE Biotherapeutics (OTCMKTS: IMMG), an early-stage biotechnology company ... better treatment for triple negative breast cancer (TNBC), announced today ... program. The YEi Start in ... help entrepreneurs grow their business in France ... companies selected to complete an intensive one week immersion in ...
(Date:2/16/2017)... LOS ANGELES , Feb. 16, 2017 /PRNewswire/ ... CAPR ), a clinical-stage biotechnology company developing first-in-class ... today announced that it has elected to terminate ... to natriuretic peptide receptor agonists, including Cenderitide. ... a strategic move as we prioritize our efforts ...
(Date:2/16/2017)... HACKENSACK, N.J. , Feb. 16, 2017  Champions ... engaged in the development and sale of advanced technology ... of oncology drugs, today announced the addition of new ... These new models will expand Champions, product ... cancer, head and neck cancer, AML, and non-small cell ...
Breaking Biology Technology: