scholarly journals Detection of PrPCWDin Postmortem Rectal Lymphoid Tissues in Rocky Mountain Elk (Cervus Elaphus Nelsoni) Infected with Chronic Wasting Disease

2006 ◽  
Vol 18 (6) ◽  
pp. 553-557 ◽  
Author(s):  
Terry R. Spraker ◽  
Thomas L. Gidlewski ◽  
Aru Balachandran ◽  
Kurt C. VerCauteren ◽  
Lynn Creekmore ◽  
...  
Keyword(s):  
Cervus Elaphus ◽  
Chronic Wasting Disease ◽  
Rocky Mountain ◽  
Lymphoid Tissues ◽  
Wasting Disease ◽  
Cervus Elaphus Nelsoni ◽  
Rocky Mountain Elk

scholarly journals Progressive accumulation of the abnormal conformer of the prion protein and spongiform encephalopathy in the obex of nonsymptomatic and symptomatic Rocky Mountain elk (Cervus elaphus nelsoni) with chronic wasting disease

2015 ◽  
Vol 27 (4) ◽  
pp. 431-441 ◽  
Author(s):  
Terry R. Spraker ◽  
Thomas Gidlewski ◽  
Jenny G. Powers ◽  
Tracy Nichols ◽  
Aru Balachandran ◽  
...  
Keyword(s):  
Prion Protein ◽  
Cervus Elaphus ◽  
Chronic Wasting Disease ◽  
Rocky Mountain ◽  
Wasting Disease ◽  
Cervus Elaphus Nelsoni ◽  
Single Section ◽  
Spongiform Degeneration ◽  
Rocky Mountain Elk ◽  
Progressive Accumulation

The purpose of our study was to describe the progressive accumulation of the abnormal conformer of the prion protein (PrPCWD) and spongiform degeneration in a single section of brain stem in Rocky Mountain elk ( Cervus elaphus nelsoni) with chronic wasting disease (CWD). A section of obex from 85 CWD-positive elk was scored using the presence and abundance of PrPCWD immunoreactivity and spongiform degeneration in 10 nuclear regions and the presence and abundance of PrPCWD in 10 axonal tracts, the subependymal area of the fourth ventricle, and the thin subpial astrocytic layer (glial limitans). Data was placed in a formula to generate an overall obex score. Data suggests that PrPCWD immunoreactivity and spongiform degeneration has a unique and relatively consistent pattern of progression throughout a section of obex. This scoring technique utilizing a single section of obex may prove useful in future work for estimating the presence and abundance of PrPCWD in peripheral tissues and the nervous system in elk with CWD.

scholarly journals PrP genotypes of captive and free-ranging Rocky Mountain elk (Cervus elaphus nelsoni) with chronic wasting disease

1999 ◽  
Vol 80 (10) ◽  
pp. 2765-2679 ◽  
Author(s):  
K. I. O’Rourke ◽  
T. E. Besser ◽  
M. W. Miller ◽  
T. F. Cline ◽  
T. R. Spraker ◽  
...  
Keyword(s):  
Cervus Elaphus ◽  
Chronic Wasting Disease ◽  
Rocky Mountain ◽  
Transmissible Spongiform Encephalopathies ◽  
Spongiform Encephalopathy ◽  
Wasting Disease ◽  
Jakob Disease ◽  
Rocky Mountain Elk ◽  
Free Ranging ◽  
Prp Gene

The PrP gene encodes the putative causative agent of the transmissible spongiform encephalopathies (TSEs), a heterogeneous group of fatal, neurodegenerative disorders including human Creutzfeldt–Jakob disease, bovine spongiform encephalopathy, ovine scrapie and chronic wasting disease (CWD) of North American deer and elk. Polymorphisms in the PrP gene are associated with variations in relative susceptibility, pathological lesion patterns, incubation times and clinical course of TSEs of humans, mice and sheep. Sequence analysis of the PrP gene from Rocky Mountain elk showed only one amino acid change (Met to Leu at cervid codon 132). Homozygosity for Met at the corresponding polymorphic site (Met to Val) in humans (human codon 129) predisposes exposed individuals to some forms of Creutzfeldt–Jakob disease. In this study, Rocky Mountain elk homozygous for PrP codon 132 Met were over-represented in both free- ranging and farm-raised CWD-affected elk when compared to unaffected control groups.

scholarly journals Passage of chronic wasting disease prion into transgenic mice expressing Rocky Mountain elk (Cervus elaphus nelsoni) PrPC

2006 ◽  
Vol 87 (12) ◽  
pp. 3773-3780 ◽  
Author(s):  
Giuseppe LaFauci ◽  
Richard I. Carp ◽  
Harry C. Meeker ◽  
Xuemin Ye ◽  
Jae I. Kim ◽  
...  
Keyword(s):  
Cervus Elaphus ◽  
Incubation Time ◽  
Chronic Wasting Disease ◽  
Mule Deer ◽  
Rocky Mountain ◽  
Intracerebral Injection ◽  
Wasting Disease ◽  
Transgenic Mouse Line ◽  
Cervus Elaphus Nelsoni ◽  
Canadian Provinces

Chronic wasting disease (CWD) of elk (Cervus elaphus nelsoni) and mule deer (Odocoileus hemionus) is one of three naturally occurring forms of prion disease, the others being Creutzfeldt–Jakob disease in humans and scrapie in sheep. In the last few decades, CWD has spread among captive and free-ranging cervids in 13 US states, two Canadian provinces and recently in Korea. The origin of the CWD agent(s) in cervids is not known. This study describes the development of a transgenic mouse line (TgElk) homozygous for a transgene array encoding the elk prion protein (PrPC) and its use in propagating and simulating CWD in mice. Intracerebral injection of one mule deer and three elk CWD isolates into TgElk mice led to disease with incubation periods of 127 and 95 days, respectively. Upon secondary passage, the incubation time was reduced to 108 and 90 days, respectively. Upon passage into TgElk mice, CWD prions (PrPSc) maintained the characteristic Western blot profiles seen in CWD-affected mule deer and elk and produced histopathological modifications consistent with those observed in the natural disease. The short incubation time observed on passage from cervid to mouse with both mule deer and elk CWD brain homogenates and the demonstrated capacity of the animals to propagate (mouse to mouse) CWD agents make the TgElk line a valuable model to study CWD agents in cervid populations. In addition, these results with this new transgenic line suggest the intriguing hypothesis that there could be more than one strain of CWD agent in cervids.

EFFICACY OF ANTEMORTEM RECTAL BIOPSIES TO DIAGNOSE AND ESTIMATE PREVALENCE OF CHRONIC WASTING DISEASE IN FREE-RANGING COW ELK (CERVUS ELAPHUS NELSONI)

2013 ◽  
Vol 49 (2) ◽  
pp. 270-278 ◽  
Author(s):  
Ryan J. Monello ◽  
Jenny G. Powers ◽  
N. Thompson Hobbs ◽  
Terry R. Spraker ◽  
Katherine I. O’Rourke ◽  
...  
Keyword(s):  
Cervus Elaphus ◽  
Chronic Wasting Disease ◽  
Wasting Disease ◽  
Cervus Elaphus Nelsoni ◽  
Rectal Biopsies ◽  
Estimate Prevalence ◽  
Free Ranging

scholarly journals PrP genotypes of free-ranging wapiti (Cervus elaphus nelsoni) with chronic wasting disease

2008 ◽  
Vol 89 (5) ◽  
pp. 1324-1328 ◽  
Author(s):  
Matteo Perucchini ◽  
Karen Griffin ◽  
Michael W. Miller ◽  
Wilfred Goldmann
Keyword(s):  
Cervus Elaphus ◽  
Gene Sequence ◽  
Chronic Wasting Disease ◽  
Wasting Disease ◽  
Susceptibility To Infection ◽  
Cervus Elaphus Nelsoni ◽  
Naturally Occurring ◽  
Genotype Frequencies ◽  
The Family ◽  
Free Ranging

Variation in PrP prion gene sequence appears to modulate susceptibility to chronic wasting disease (CWD), a naturally occurring prion disease affecting four North American species of the family Cervidae. Wapiti (Cervus elaphus nelsoni) PrP is polymorphic at codon 132 [methionine (M) or leucine (L)]. We genotyped 171 samples, collected between 2002 and 2005 from CWD-infected and uninfected wapiti from three free-ranging populations in Colorado, USA, to study influences of PrP polymorphisms on CWD susceptibility further. Overall genotype frequencies for 124 apparently uninfected animals were 65.3 % MM132, 32.3 % ML132 and 2.4 % LL132; for 47 CWD-infected animals, these frequencies were 70.2 % MM132, 27.7 % ML132 and 2.1 % LL132. Surprisingly, our data revealed that, among recent (approx. 2002–2005) CWD cases detected in free-ranging Colorado wapiti, the three PrP codon 132 genotypes were represented in proportion to their abundance in sampled populations (P≥0.24) and all three genotypes showed equivalent susceptibility to infection.

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