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This profile was automatically generated using 34 references found on the Internet. This information has not been verified. Learn more...
This profile was automatically generated using 34 references found on the Internet. This information has not been verified. Learn more...
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1. www.weatherforddemocrat.com
www.weatherforddemocrat.com/fa - [Cached]Published on: 7/10/2007 Last Visited: 7/10/2007
Lambs are the most susceptible, mainly because their immune systems are not fully developed, said Frances Cassirer, a wildlife research biologist with Idaho Fish and Game.
Pneumonia is the leading killer of bighorns infected with mycoplasma, she said. In herds not infected, the leading cause of death is predators, she said.
In blood samples from herds in several western states and Alberta, Canada, WSU researchers found antibodies to the mycoplasma in herds that experienced deaths due to pneumonia, but not in herds that had not.
''We found some really promising patterns and things seemed to fit together really well,'' Cassirer said.
Further testing on the bacteria's effects are being conducted.
About 2 million bighorns once inhabited the West, but they disappeared over most of their range in the 1800s and early 1900s due to unregulated hunting and disease believed to have been carried by domestic animals, biologists say.
Repopulating projects and added protection in the last 50 years have now boosted bighorn numbers to about 50,000, Cassirer said.
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If mycoplasma bacteria are to blame, treating infected sheep may not be possible, said Cassirer. Attempts to develop vaccines for the bacteria for domestic sheep have failed, and even if a working vaccine existed, administering it to wild bighorns would be difficult, she said.
Furthermore, biologists have not found that infected herds can build a resistance to the bacteria over successive generations, Cassirer said.
''If it's happening, it's not obvious to us. That's why we're looking for another solution because the sheep might not be able to deal with it on their own,'' she said. -
2. www.ictws.org
www.ictws.org/updates/News_Ann - [Cached]Published on: 1/1/2008 Last Visited: 1/2/2008
Nominations should be sent by letter (email or regular mail) to Frances Cassirer (address below) by 1 February 2008.
Frances Cassirer Idaho Department of Fish and Game 3316 16th Street Lewiston, ID 83501 (208) 799-5010 fcassirer@idfg.idaho.gov -
3. Domestic Goats are Suspects in Spread of Diesease to Bighorn Sheep
www.aasrp.org/hot_topics/2004/ - [Cached]Published on: 4/12/2004 Last Visited: 1/23/2008
Frances Cassirer, a wildlife biologist for the Idaho Department of Fish and Game at Lewiston, directs efforts to restore the sheep to Hells Canyon.
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Cassirer and Coggins want to keep goats away from wild sheep herds in Hells Canyon and canyons of southeastern Washington and northeastern Oregon.
"I think most of the land management agencies are on board with that," Cassirer said.

