Mule Deer Lousy in Wyoming

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From the Wyoming Game and Fish Department

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An adult mule deer buck collected from hunt area 80 near Saratoga was found to have a heavy infestation of the exotic louse Bovicola tibialis. This is the first time this nonnative external parasite has been documented in Wyoming

http://wdfw.wa.gov/factshts/hairloss.htm

this exotic louse was thought to be one factor in a large mule deer decline in eastern Washington.”If it affects Wyoming mule deer similarly to how it has affected Washington state mule deer, then we would expect this parasite to be a source of additional mortality in our herds, disproportionately affecting fawns. Although treatable in captive deer, there is no effective treatment for free-ranging deer,” Kreeger said.

Deer infected with exotic lice tend to develop severe skin irritation, leading to excessive grooming by the animal and eventual patchy hair loss and loss of body condition. Lice infestations are heaviest during winter and early spring. Normal seasonal hair loss or molting can usually be distinguished from disease related hair loss because the coat under the molt appears normal and healthy. According to the Washington state site this exotic louse does not affect humans or domestic livestock.

Anyone observing wildlife that appears sick is encouraged to contact their local game warden or wildlife biologist or call their regional Game and Fish office.

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