ProMED-mail |

Published Date: 2012-03-25 20:58:45
Subject: PRO/AH/EDR> Chronic wasting disease, cervid – USA (05:): (VA, WI)
Archive Number: 20120325.1080432

CHRONIC WASTING DISEASE, CERVID – USA (05): (VIRGINIA, WISCONSIN)
*******************************************************************
A ProMED-mail post
http://www.promedmail.org
ProMED-mail is a program of the
International Society for Infectious Diseases
http://www.isid.org

[1] Virginia
Date: 12 Mar 2012
Source: Virginia Department of Game & Inland Fisheries
http://www.dgif.virginia.gov/news/release.asp?id=326

News Release For Immediate Release
Contact Lee Walker, Media
Relations Manager, 804-912-6121=20

VDGIF recognizes assistance of hunters, reports 2 new CWD positives in western Frederick County

Additional Contacts:
Megan Kirchgessner, Wildlife Veterinarian Telephone: 804-367-8944
Nelson Lafon, Deer Project Coordinator Telephone: 540-569-0023

Not unexpectedly, 2new cases of chronic wasting disease (CWD) have been detected very close to where CWD-infected deer were found in 2009 and 2010. Both deer - a 4.5 year old buck and 1.5 year old doe - were killed by a hunter in November 2011 in western Frederick County, Virginia, very close to the West Virginia border. Given the proximity of these new positives to the previous cases, changes to the current management actions or restrictions are not anticipated, although CWD surveillance in that particular area may be heightened.

The Virginia Department of Game and Inland Fisheries (VDGIF) would like to thank all of the hunters in Frederick and Shenandoah counties for their excellent cooperation during CWD sample collection this past fall. VDGIF submitted over 525 samples for CWD testing from deer brought to check stations, self-service drop stations, or deer killed on the road in these 2 counties. In addition, 1,120 samples distributed over every county in the remainder of the state were submitted for CWD testing and no additional positives were detected.

VDGIF plans to continue collecting CWD samples during future hunting seasons, along with other management options implemented after the initial detection of CWD in 2009. These management actions include: prohibiting the feeding of deer year-round both in and near the Containment Area, prohibiting the movement of deer carcasses and parts out of the Containment Area (with exceptions), restricting the disposal of deer wastes from the Containment Area, prohibiting the rehabilitation of deer in the Containment Area, and maintaining liberal seasons and bag limits on private lands in an attempt to reduce the deer population. The Containment Area is located in western Frederick and Shenandoah Counties.

As of March 12, 2012, CWD has been detected in 19 states and 2 Canadian provinces. The disease is a slow, progressive neurological (brain and nervous system) disease found in deer, elk, and moose in North America. The disease ultimately results in death of the animal. Signs exhibited by CWD-infected deer include, staggering, abnormal posture, lowered head, drooling, confusion, and marked weight loss. There is no evidence that CWD can be naturally transmitted to humans, livestock, or pets. More information on CWD can be found on the VDGIF website at
http://www.dgif.virginia.gov/wildlife/diseases/cwd/.
--
Communicated by:
Terry S. Singeltary Sr. <flounder9@verizon.net>

****
[2] Wisconsin

Date: 23 Mar 2012
Source: MDConline [Edited]
http://mdc.mo.gov/newsroom/three-more-cases-cwd-found-free-ranging-deer-macon-county

The Missouri Department of Conservation (MDC) received final test results today from tissue samples taken from 656 free-ranging deer harvested earlier this year. Results included 3 CWD-positives with two from adult does and one from an adult buck. The testing was conducted specifically for CWD sampling by MDC staff and area landowners over a 163-square-mile area in northeast Linn and northwest Macon counties.

Missouri’s first 2 cases of CWD in free-ranging deer were detected in 2 adult bucks harvested in northwest Macon County during the 2011 fall firearms deer season. The 3 most recent CWD positives were harvested within 2 miles of the 2 original cases of CWD.

MDC conducted its 2011 fall tissue-sampling effort in response to 2 cases of CWD found in captive white-tailed deer at 2 private, captive-hunting preserves in Macon and Linn counties. Since October 2011, 3 more captive deer at the Macon County preserve have tested positive for CWD. Depopulation, quarantine and other management activities at the private preserve are being coordinated by the Missouri Department of Agriculture. The 5 cases of CWD in free-ranging deer have been found within 2 miles of the Macon County preserve.

While MDC identified Missouri's first 2 cases of CWD in free-ranging deer from test results received in January, the Department has been testing for it for years. With the help of hunters, MDC has tested more than 34,000 free-ranging deer for CWD from all parts of the state since 2002.

MDC staff are further analyzing recent test results, continuing to evaluate efforts and lessons learned from other states with CWD, and consulting with various other wildlife experts around the country. The Department’s main objectives are to limit the prevalence and restrict the spread of CWD in Missouri.

According to MDC Deer Biologist Jason Sumners, there are several main factors associated with the management of free-ranging deer that will influence the future prevalence and distribution of CWD in Missouri: local deer density, deer concentration, the movement of deer and the movement of deer carcasses.
"Yearling and adult male deer have been found to exhibit CWD at a much higher rate than yearling and adult females," Sumners said. "Of the 10 cases of CWD identified in both captive and free-ranging deer in Missouri, eight have been in adult bucks. Additionally, dispersal of yearling males from the ranges where they were born is one of the most likely means of expanding the distribution of CWD. The movement of infectious materials in the form of hunter-harvested deer carcasses that contain heads and spinal columns, where the disease concentrates, may also serve as a means of introducing CWD to other regions of the state."

Sumners added that CWD has been found in only one small pocket of the state. "Our management efforts will focus on minimizing the prevalence and preventing the further spread of the disease from the area. We will keep the public informed as we develop those efforts."

CWD is a neurological disease that is limited to deer, elk, moose and other members of the deer family, known as "cervids." CWD can only be confirmed in deer by laboratory testing of the brain stem or lymph tissue. CWD is transmitted through prions, which are abnormal proteins that attack the nervous systems of these species. These prions accumulate in the brain, spinal cord, eyes, spleen, and lymph nodes of infected animals. CWD is spread by animal-to-animal contact or by animal contact with soil that contains prions from urine, feces or the decomposition of an infected animal.

Deer and other cervids with signs of CWD show changes in natural behavior and can exhibit extreme weight loss, excessive salivation, stumbling and tremors. CWD can be present in and transmitted by infected animals for up to several years before symptoms of the disease appear.

"Most deer that test positive for CWD appear to be healthy," Sumners said. "Although one of the free-ranging does that tested positive for CWD did exhibit clinical signs of the disease."

The Missouri Department of Agriculture (MDA) says there is no evidence from existing research that CWD can spread to domestic livestock, such as sheep or cattle. The Missouri Department of Health and Senior Services (MDHSS) says there is no scientific evidence that CWD is transmissible to humans through contact with or the consumption of deer meat.

The disease was first recognized in 1967 in captive mule deer in Colorado. CWD has been documented in both captive and free-ranging deer in Missouri, along with neighboring Kansas and Nebraska. It has been documented in free-ranging deer in neighboring Illinois, and in captive elk in neighboring Oklahoma. CWD has also been documented in both captive and free-ranging members of the deer-family in Colorado, Minnesota, New York, South Dakota, Wisconsin and the Canadian provinces of Alberta and Saskatchewan. Maryland, New Mexico, North Dakota, Utah, Virginia, West Virginia and Wyoming also have documented cases of CWD in free-ranging members of the deer family. Michigan and Montana have documented cases of CWD in captive members of the deer family.

[by Joe Jerek]
--
Communicated by:
Terry S. Singeltary Sr. <flounder9@verizon.net>

[Neither Virginia nor Wisconsin are announcing any staggering increase in numbers of CWD positive animals nor is there a range expansion.

Generally after the hunting season we start to see reports of confirmation if there were any hunter killed animals that were positive for the malady. Most states use the assistance of the hunters during hunting season to assist with surveillance of this disease.

Interactive HealthMap/ProMED maps of these locations may be found at:
http://healthmap.org/r/1hgE and http://healthmap.org/r/1Fgq
– Mod.TG]

See Also