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CWD kills 25% of elk IN PENS CONTAMINATED WITH CWD

CWD kills 25% of elk IN PENS CONTAMINATED WITH CWD

Subject: Wasting disease kills 25% of elk IN PENS CONTAMINATED WITH CWD 11 OF 43 IN FOUR YEARS
Date: February 16, 2006 at 10:20 am PST

DRAFT

WYOMING GAME AND FISH DEPARTMENT

CHRONIC WASTING DISEASE MANAGEMENT PLAN

February 17, 2006

snip...

5. Predicted population effects on free-ranging elk based on captive elk chronically exposed to the CWD prion.
Forty-three female elk calves were trapped at the National Elk Refuge and transported to Sybille in February 2002. Elk were housed in pens, assumed to be environmentally contaminated with the CWD prion. Elk will be held throughout their lifetimes. Elk dying will be examined and cause of death determined. From these data, it will should be possible to model free-ranging elk mortality and population dynamics under extreme circumstances of CWD prion exposure and transmission. As of December 2005 (46 months post capture), 11 of 43 elk have died due to CWD. This compares to 100% mortality in less than 25 months in elk orally inoculated with different dosages of the CWD prion.

REVISED DRAFT

http://gf.state.wy.us/downloads/pdf/CWD2005reviseddraft.pdf

DRAFT

http://gf.state.wy.us/downloads/pdf/CWD2005Plan8-19-05.pdf

http://gf.state.wy.us/downloads/pdf/04-05_annual_report.pdf

tss
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CWD kills 25% of elk IN PENS CONTAMINATED WITH CWD

These same results were discovered in the late 60' and early 70's. It would be more interesting to discover one time exposure lethality. In other words, what one time exposure dose is required to induce death to a certain percentage of the population.

Having the elk walk endlessly around in the same cwd pen day-in-day-out will probably have 100% lethality over a long enough time.

These pen studies virtually always prove that given enough time cwd kills all. However you have the same facts that elk/deer are not rapidly keeling over in cwd hot spots that have existed for decades. To me this shows that the test environments do not model nature very well at all.

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