| ectoparasites from elk (cervus elaphus nelsoni) from wyoming. | hides of nine elk, collected during the winter of 1986-1987 from the national elk refuge, wyoming (usa) were examined for ectoparasites. parasites recovered were mites, psoroptes sp. (five elk); lice, solenopotes ferrisi and bovicola (bovicola) longicornis (seven elk); and winter ticks, dermacentor albipictus (nine elk). three elk with severe scabies had an estimated 0.6 x 10(6), 3.8 x 10(6) and 6.5 x 10(6) mites, respectively. densities of mites were much higher in skin regions with severe derm ... | 1991 | 1920665 |
| spongiform encephalopathy of rocky mountain elk. | a disease with striking clinical and pathologic similarities to the spongiform encephalopathies is described in six rocky mountain elk (cervus elaphus nelsoni) maintained in wildlife facilities in colorado and wyoming. clinical signs included behavioral alterations and progressive weight loss over a period of weeks or months. consistent microscopic lesions were limited to the central nervous system and characterized by widespread spongiform transformation of the neuropil, intracytoplasmic vacuol ... | 1982 | 7154220 |
| survey of free-ranging elk from wyoming and montana for selected pathogens. | from december 1991 through january 1995, a disease survey was conducted on herds of free-ranging, hunter-killed elk (cervus elaphus nelsoni) from three areas in proximity to yellowstone national park (ynp), wyoming (usa), after tuberculosis caused by mycobacterium bovis was discovered in a captive herd of elk in the area. complete or partial sets of specimens from 289 elk collected between december 1991 and january 1993 were examined histologically; no mycobacterial lesions were observed. lesion ... | 1997 | 9131561 |
| epizootiology of chronic wasting disease in free-ranging cervids in colorado and wyoming. | surveillance and epidemic modeling were used to study chronic wasting disease (cwd), a transmissible spongiform encephalopathy that occurs naturally among sympatric, free-ranging deer (odocoileus spp.) and rocky mountain elk (cervus elaphus nelsoni) populations in contiguous portions of northeastern colorado and southeastern wyoming (usa). we used clinical case submissions to identify endemic areas, then used immunohistochemistry to detect cwd-infected individuals among 5,513 deer and elk sample ... | 2000 | 11085429 |
| chronic wasting disease of cervids. | chronic wasting disease (cwd) has recently emerged in north america as an important prion disease of captive and free-ranging cervids (species in the deer family). cwd is the only recognized transmissible spongiform encephalopathy (tse) affecting free-ranging species. three cervid species, mule deer (odocoileus hemionus), white-tailed deer (o. virginianus), and rocky mountain elk (cervus elaphus nelsoni), are the only known natural hosts of cwd. endemic cwd is well established in southern wyomin ... | 2004 | 15148993 |
| effects of management, behavior, and scavenging on risk of brucellosis transmission in elk of western wyoming. | brucellosis is endemic in elk (cervus elaphus nelsoni) using winter feedgrounds of western wyoming, usa presumably because of increased animal density, duration of attendance, and subsequent contact with aborted fetuses. however, previous research addressed antibody prevalence rather than more direct measures of transmission and did not account for elk behavior or scavenging in transmission risk. throughout march and early april 2005-07, we monitored 48 sets of culture-negative, pseudoaborted el ... | 2009 | 19395749 |
| brucellosis transmission between wildlife and livestock in the greater yellowstone ecosystem: inferences from dna genotyping. | the wildlife of the greater yellowstone ecosystem carries brucellosis, which was first introduced to the area by cattle in the 19th century. brucellosis transmission between wildlife and livestock has been difficult to study due to challenges in culturing the causative agent, brucella abortus . we examined b. abortus transmission between american bison ( bison bison ), rocky mountain elk ( cervus elaphus nelsoni), and cattle ( bos taurus ) using variable number tandem repeat (vntr) markers on dn ... | 2017 | 28118557 |
| endemic chronic wasting disease causes mule deer population decline in wyoming. | chronic wasting disease (cwd) is a fatal transmissible spongiform encephalopathy affecting white-tailed deer (odocoileus virginianus), mule deer (odocoileus hemionus), rocky mountain elk (cervus elaphus nelsoni), and moose (alces alces shirasi) in north america. in southeastern wyoming average annual cwd prevalence in mule deer exceeds 20% and appears to contribute to regional population declines. we determined the effect of cwd on mule deer demography using age-specific, female-only, cwd transi ... | 2017 | 29049389 |