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Health Issues Which May Affect This Animal
What Causes This Disease?Brucellosis in elk, bison, and cattle is caused by Brucella abortus. There are a variety of other Brucella species can affect sheep (B. ovis), goats (B. melitensis), pigs, caribou and reindeer (B. suis), dogs (B. canis), and several species of marine mammals.
Where Is The Disease Found?Brucellosis is found worldwide in livestock, but most countries have control or eradication programs to control or eliminate the disease. Brucellosis has largely been eliminated from domestic livestock in North America. A reservoir of brucellosis occurs in elk and bison in the Greater Yellowstone Area which includes eastern Idaho. Because wild ungulates and cattle share range, disease transmission to domestic cattle is of great concern.
Signs of DiseaseThere are no obvious signs of brucellosis in infected animals. Abortions can occur in the middle trimester of pregnancy. Elk infected with brucellosis may abort between January and June. There are no typical outward signs of Brucellosis in most animals. Males that are infected with brucellosis may have swollen testicles or swollen joints. In chronic infections can lead to infertility in both males and females..
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What Causes This Disease?Giant liver flukes (Fascioloides magna), also known as the American liver fluke or deer fluke, are flatworms are important parasites of deer, elk and moose in North America. The flukes are a normal parasite in white-tailed deer and occasionally elk.
Where Is The Disease Found?Giant liver flukes are found in mule deer, white-tailed deer, elk, and moose in many parts of North America. Giant liver flukes have been documented sporadically in a few mule deer, elk and moose in Idaho.
Signs of DiseaseAnimals infected with giant liver flukes generally appear healthy unless large numbers of flukes are present. With large numbers of flukes, generally the liver function is compromised leading to animals in poor body condition. In definitive hosts, flukes are found in yellowish-white fibrous cysts that 1-2 inches across that contain pairs of flukes. A reddish brown liquid is found inside the cysts with the flukes. In animals that are not definitive hosts for giant liver flukes, the flukes can cause significant liver damage and ill thrift or death in severely affected individuals. The flukes continue to migrate in the liver creating numerous tracts and extensive liver damage that can lead to fibrosis and liver failure.
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