| 1. | Threats include fragmentation and loss of habitat, unregulated eradication or control efforts, and sylvatic plague.
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| 2. | Because black-footed ferrets prey on black-tailed prairie dogs, wild ferret populations also fall victim to sylvatic plague.
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| 3. | Sylvatic plague is normally enzootic, meaning it occurs at regular, predictable rates in populations and specific areas.
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| 4. | Sylvatic plague is most commonly found in prairie dog colonies and some mustelids like the black-footed ferret.
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| 5. | Sylvatic plague, caused by the bacterium " Yersinia pestis ", can quickly eliminate entire black-tailed prairie dog colonies.
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| 6. | Sylvatic plague, he explained, is carried by fleas, and is the disease known as bubonic plague when it occurs in humans.
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| 7. | In recent years, sylvatic plague, known as bubonic plague in humans, has severely reduced prairie dog colonies in the West, Knowles said.
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| 8. | What was not expected was the epidemic of sylvatic plague that wiped out most of Shirley Basin's prairie dogs, the ferrets'main food source.
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| 9. | They can directly contract Sylvatic plague ( " Yersinia pestis " ), and epidemics in prairie dog towns may completely destroy the ferrets'prey base.
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| 10. | But sylvatic plague, known as the bubonic plague in humans, has killed off prairie dogs on thousands of acres in the region since the early 1990s.
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