Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Avian cholera could spread from Great Salt Lake

15.11.2004


Scientists at the U.S. Geological Survey’s (USGS) National Wildlife Health Center are concerned that avian cholera, which recently killed about 30,000 eared grebes--small, diving water birds--at Great Salt Lake, Utah, could spread as birds migrate south for the winter, the agency announced today. Last week, USGS scientists isolated Pasteurella multocida, the bacterium that causes avian cholera, from dead grebes that were sent to the USGS National Wildlife Health Center in Madison, Wis. USGS scientists are working with Utah biologists to monitor the situation.



"We haven’t observed significant avian cholera outbreaks in North America since 1998, so we aren’t certain if this mortality represents an isolated event or a renewal of regular outbreaks," says Mike Samuel, a USGS scientist and avian cholera expert. "Because recent research shows that birds are the primary reservoir for maintaining and spreading this disease, we need to consider the possibility that grebes and other birds will spread avian cholera beyond the Great Salt Lake during their migration to wintering areas." Each fall about 1.5 million eared grebes congregate at the Great Salt Lake as they migrate south.

Avian cholera is the most common infectious disease among wild North American waterfowl. Once birds are infected with P. multocida, they die quickly, sometimes within 6 to 12 hours after infection. Bacteria spread by dead and dying birds can subsequently infect healthy birds. As a result, avian cholera can sweep quickly through a wetland and kill thousands of birds in a single outbreak.


Avian cholera outbreaks occur primarily in winter and early spring. During these times, waterfowl are usually in dense groups on wintering or staging areas and may be experiencing stress due to crowding and severe weather. These conditions may serve to initiate an outbreak and facilitate transmission of the disease. Previous outbreaks of avian cholera have erupted at Great Salt Lake, killing tens of thousands of birds. The bacterium that causes avian cholera is not a significant human health threat, although the disease is readily transmitted among bird species.

Avian cholera was introduced to North America from domestic fowl and eventually spread to wild bird populations during the 1940s. Since that time, it has spread throughout most of the U.S. Over the past 10 to 15 years, avian cholera has recurred almost annually in several areas: southern Saskatchewan, California’s Central Valley and Klamath Basin, the Texas panhandle and rice belt, the Rainwater Basin of Nebraska, and in the Mississippi and Missouri River drainages. For more information on avian cholera, go to http://www.nwhc.usgs.gov/research/avian_cholera/avian_cholera.html.

Rex Sohn | EurekAlert!
Further information:
http://www.usgs.gov
http://www.nwhc.usgs.gov/research/avian_cholera/avian_cholera.html

More articles from Ecology, The Environment and Conservation:

nachricht Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)

nachricht The disappearance of common species
01.02.2018 | Technical University of Munich (TUM)

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

Im Focus: Autonomous 3D scanner supports individual manufacturing processes

Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).

Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Fingerprints of quantum entanglement

16.02.2018 | Information Technology

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers

16.02.2018 | Health and Medicine

Hubble sees Neptune's mysterious shrinking storm

16.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>