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 Upcycling of PET Bottles: New Ideas for Resource Cycles in Germany
25.06.2018 | Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF

nachricht Dry landscapes can increase disease transmission
20.06.2018 | Forschungsverbund Berlin e.V.

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: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Microscopic trampoline may help create networks of quantum computers

17.07.2018 | Information Technology

In borophene, boundaries are no barrier

17.07.2018 | Materials Sciences

The role of Sodium for the Enhancement of Solar Cells

17.07.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>