CWD


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3212
August 5, 2014, 07:07 PM
Well,CWD has raised its ugly head for the 3rd time in Pennsylvania.This time on a deer farm.When are the authorities going to clamp down on these operations.Transporting farmed deer has brought CWD to the eastern U.S.This may destroy the sport hunting economy to enrich a few deer farmers.It ticks me off to hear a deer farming association officer say "When the wild deer are gone the hunters will have to patronize our operations."

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ridgerunner1965
August 5, 2014, 10:02 PM
im in mo and just got a flyer from the conservation dept on cwd.

the mo legislature bowed to captive deer lobbyists and passed some laws redefineing captive deer as livestock.this keeps the dept of conservation from being able to have authority to fight cwd. the gov vetoed these bills.to save the wild deer. legislators hope to over ride his veto in sept.


REALLY? screw a whole state full of hunters for a few captive deer farmers???REALLY?

WHO and i mean who votes these aholes into office?

it appears if yu have a big enuf lobby you can do bout anything apparently.

give gifts and money to your local legislators thru your lobby and they will pass about any law yu want? am i mistaken?

everybody i know hunts wild deer but i dont even know of a deer farm in my area. so basically they are catering to the few and screw the many?

just because the few have more money to lobby them?

when is it going to be politician season?

ridgerunner1965
August 5, 2014, 10:23 PM
after reading more about this subject from various sources i am really mad.

deer in my area are healthy now but who knows what will happen if this keeps on.

we had a bad outbreak of blue tounge a couple years ago. it really cut down on the deer pop.

what a lot of people dont realize is that venison is a major source of protein for a lot of familys in my area. many people i know depend on getting a deer or two every year to supplement the grocery budget.i know i do. for a few captive deer farmers to endanger a whole way of life is insane.

i hope our govenor stands strong.

i know i live in kind of a depressed area but that dont mean we shud be hungry on top of being poor.

buck460XVR
August 6, 2014, 09:44 AM
No need to get overly excited. Cautious, concerned and preventive yes, but CWD has been in Wisconsin for some time now and there are still so many deer that I won't ride a motorcycle at night and you still get a free antlerless tag with every hunting license. Here, where deer are scarce, there is no CWD present, the populations are low because of over harvesting. CWD is a deer disease of high populations and close proximity and for the most part, other than some measures to prevent the spread, most hunters won't notice the difference of before and after.

Ranger Roberts
August 6, 2014, 10:24 AM
Well,CWD has raised its ugly head for the 3rd time in Pennsylvania.This time on a deer farm.

OP, do you have a link to this story? If not, what part of PA was it in?

3212
August 6, 2014, 11:43 AM
Its in Jefferson County.The new disease management area involves Jefferson and Clearfield Counties.Check the PGC website.

3212
August 6, 2014, 11:52 AM
Ridgerunner 1965,my sentiments exactly.The more money these deer farmers make,the more money they can throw to politicians to keep the scheme going.I also hunt deer for the venison as a supplement to the grocery budget.I don't trust venison from a disease area,so my hunting area is being reduced.No way will I pay to hunt deer.A few years ago a fellow told me he was going to pay $5,000 dollars to shoot a trophy buck on a "preserve".This is what we are up against.

HB
August 6, 2014, 02:37 PM
Another Missouri resident here and I agree with the above posts. I don't know anybody that's "hunted" captive deer but apparently there is a lot of money in it. CWD started in Macon county then spread to adjacent counties quickly. Now the dept of conservation is fighting an uphill battle. Just highlights the fact that every dollar you put towards conservation matters.

Speedo66
August 9, 2014, 08:07 PM
it appears if yu have a big enuf WALLET you can do bout anything apparently.




Fixed

buck460XVR
August 10, 2014, 12:52 PM
Just because CWD was first discovered in captive deer, doesn't mean it originated there......... again, it is a disease of close proximity. Thus captive deer are more susceptible to exposure. They are also more closely observed and monitored, thus sick animals are quickly recognized......not so much with wild deer. Since the disease acts and kills quite quickly once it manifests itself, sick deer in the wild are not around for long to be observed. The promotion of feeding wild deer, baiting wild deer and planting small food plots to attract deer to a small area also greatly increases he odds that deer will be exposed to the prions that spread the disease. Thus, those that hunt wild deer and do those things are just as guilty as folks that raise deer on deer farms. Wisconsin has found the only way to reduce CWD is to reduce deer populations. Hard to do when the majority of prime habitat is privately owned and access to hunting there regulated by landowners looking to keep a high population of animals on their property. Want high populations of game animals, expect to have the diseases that come with them. This is true whether they are captive or wild.

3212
August 10, 2014, 11:43 PM
But,the transporting of farmed deer brought the disease to the eastern states.It did not spring up spontaneously here.For it to spread through wild deer from Colorado to Pennsylvania would have taken much longer.Read the article about CWD in the Charleston Gazette/West Virginia June 29,2014.Its posted online under CWD in West Virginia.Read the last part about the disease monitoring of the Agriculture Department.It states that infected animals are lost in the the system and farmers are shipping deer all over the country.

buck460XVR
August 11, 2014, 02:52 PM
But,the transporting of farmed deer brought the disease to the eastern states.It did not spring up spontaneously here.For it to spread through wild deer from Colorado to Pennsylvania would have taken much longer.Read the article about CWD in the Charleston Gazette/West Virginia June 29,2014.Its posted online under CWD in West Virginia.Read the last part about the disease monitoring of the Agriculture Department.It states that infected animals are lost in the the system and farmers are shipping deer all over the country.

Yes, but there is evidence that wild deer were originally infected from domestic sheep and research on the disease inadvertently passed it on to penned deer. Penned deer shipped across the country help spread it to other penned deer. Supposedly escaped pen deer exposed wild deer to the prion. Much like the Emerald Ash Borer, other invasive species and other diseases of ungulates, man unintentionally helped the spread. We know should know better. One reason deer cannot be shipped in from other states here anymore. I need not read the West Virginia articles, because they are no different than what we have been told for the last dozen years here. West Virginia has long ways to go to catch up with current knowledge of the disease. Most states that have not encountered it yet, tend to completely ignore it till it shows up, and then they panic. Again, the disease is not passed casually. It could have been around for all eternity, but when deer are at natural numbers in natural environments, exposure is so little, that very few cases ever manifested themselves.


Good article on it here........http://www.stopcwd.org/library/library2.cfm?articleID=13

3212
August 11, 2014, 07:09 PM
OK.So, a known method of spreading the disease is shipping deer around the country. Why would we enable the spread with so much at stake?If this disease is found in nature,why is it not reported in those states with large deer populations outside these disease areas?Surely hunters or others spending time in deer habitat would have reported it.Here in PA,there are pastures shared by sheep and deer and in my 50 years of deer hunting I never read or heard of infected deer.If I were a betting man I would bet that researchers experiments created this disease.

mountain_man
August 11, 2014, 10:50 PM
OK.So, a known method of spreading the disease is shipping deer around the country. Why would we enable the spread with so much at stake?If this disease is found in nature,why is it not reported in those states with large deer populations outside these disease areas?Surely hunters or others spending time in deer habitat would have reported it.Here in PA,there are pastures shared by sheep and deer and in my 50 years of deer hunting I never read or heard of infected deer.If I were a betting man I would bet that researchers experiments created this disease.
I doubt that research experiments created CWD. From my understanding it is caused by a prion which is an improperly folded protein. It is a type of spongiform encephalitis, which mad cow is also. Spongiform encephalitis is a naturally occurring thing. Have you ever heard of Creutzfeldt Jacobson Disease in humans (CJD)? It is caused by prions and is like mad cow disease, only it is in humans. The misfolded proteins or prions can occur naturally in all populations. It is rare, but can happen when proteins are made in the body and fold in a random improper manner. It can also be genetic instead of random, stemming from an allele that codes for improper protein formation.

For one animal to get it from another animal there has to be a transfer of the prion from one to another, so ingestion is one way that prions can transfer from animal to animal. However since deer are not carnivores I doubt that that is how they spread. Generally it is spread through the ingestion of infected tissue, and since it effects the brain this means eating brains. There are cannibalistic cultures where spongiform encephalitis is more common than the rest of the world, simply because they eat the brains of people. Prions are thought also be transmitted through blood, again a possible vector of transmission during fighting. However "catching" prions is not like catching a virus when someone coughs, or bacteria from a dirty surface. However the prions that cause CWD may have another transmission vector that is unique to CWD that I have not heard about yet, but the above is based on the general transmission of prions as taught in biochemistry. It is my understanding that the mad cow outbreak in England was because of the incorporation of animal protein in feed rations (using the parts of a cow that were not eaten in feed to boost the protein numbers).

Now this is just a guess of mine, but I feel like the reason that CWD is seen more in captive deer is that it generally takes a large chunk of time before symptoms develop. In cows it can take as long as 8 years (but generally shows itself in 4-5 years) for an animal that has prions to exhibit mad cow disease. Now in the wild where there is predation the chance for an animal to be infected is already low, combine that with a possible long "incubation" period, and the animal will probably be eaten before it shows symptoms. Now take away the predators and prolong the deer's life so he becomes trophy size, and you may have allowed the disease enough time to impact the deer's brain to the point of showing symptoms. Again this is just a theory of mine, but it seems plausible.

Again this is my understanding based on what I was taught in biochemistry, and yes I did pretty well in it, lol. But knowledge on the subject of prions may have changed since then

buck460XVR
August 12, 2014, 09:32 AM
If I were a betting man I would bet that researchers experiments created this disease.


OMG....another conspiracy theory!

Same BS was spread around here when CWD was first discovered. Musta been the DNR that infected deer to lower the deer population. Or an antis plan to take away our deer first, and then the guns we use on them. Of course the same conspiracy theory was claimed about the Deer Tick.

ZeroJunk
August 12, 2014, 11:26 AM
Here in NC there are some stiff regulations on what and how you can bring dead deer parts in to the state from infected areas. I'm sure regulations for bringing in live deer from anywhere are similarly regulated. So far we have no CWD. Hope it stays that way.

buck460XVR
August 12, 2014, 03:38 PM
Here in NC there are some stiff regulations on what and how you can bring dead deer parts in to the state from infected areas. I'm sure regulations for bringing in live deer from anywhere are similarly regulated. So far we have no CWD. Hope it stays that way.

Same here.

http://dnr.wi.gov/topic/wildlifehabitat/carcassmovement.html

3212
August 12, 2014, 07:02 PM
I did not say conspiricy.I don't believe in conspiricy theories.I don't believe anyone would purposely do that.There is the possibility that sheep could infect deer.I can imagine a researcher trying to duplicate that to see if its possible.Research involves venturing into unknown territory with unknown results.Things can happen out of the researchers control.I understand that.Check out the book "The Hot Zone".On the subject of deer parts,we have had that ban for years but the deer farms brought it into the state.

Patocazador
August 12, 2014, 07:10 PM
As far as I know, there is no CWD in Florida. To try and prevent it from coming in, it is illegal to import deer (all cervids) into the state. Out Of state hunters aren't supposed to transport deer or elk carcasses into Fla. unless it's just the meat.
Of course, we all know that hunters with their Colorado elk or their Wisc. deer aren't going to pay much attention to that if their taxidermist is here.
Having the law is one thing, enforcing it is quite another.

buck460XVR
August 12, 2014, 07:23 PM
Check out the book "The Hot Zone".On the subject of deer parts,we have had that ban for years but the deer farms brought it into the state.


Read that book back in the 90s. One book that is just as relative to CWD is the 1969 Michael Crichton book The Andromeda Strain. About a virus that evolves from fatal to harmless. This is supposedly what happened to the prion that causes CWD....it evolved from a sheep disease to a deer disease. The fear is that at some point it may evolve(like mad cow) into a disease that may infect humans. Just as likely is that it may evolve into something totally harmless. As it is now, the disease is not a threat to humans, nor is it easily transmitted to deer with normal population numbers, feeding on normal browse, in wild habitat. The baiting, feeding and the attracting deer in high numbers to small areas via food plots is the most probable way wild deer will transmit it.

It doesn't matter how it got there now that CWD is present. What matters now it how to keep it from spreading or how to keep exposure of healthy animals to the prions to a minimum. While the transportation of penned animals may have brought the disease to your area, it has nuttin' to do with preventing it from spreading now that it is there. If there have been regs about the transportation of wild deer parts for years, then the appearance and the threat of CWD is not new.

3212
August 12, 2014, 08:22 PM
When I wrote "created the disease" I meant introduced the disease to penned deer.But,my original post was about transporting deer.With out the transporting the disease would be more confined.I recently read an ad for the sale of hundreds of farmed deer from one farm.Also saw a picture of many bucks with huge antlers in a small pen.I don't know how old those bucks were.I'm just hoping this industry can be prevented from infecting new areas far from the present disease sites.

ZeroJunk
August 12, 2014, 09:17 PM
I can't imagine why a deer farmer would import deer from a CWD infected area.

samort457
August 12, 2014, 10:08 PM
I can't imagine why a deer farmer would import deer from a CWD infected area.
$$money$$

H&Hhunter
August 13, 2014, 12:00 AM
So not to comment on the politics or the attitudes of the deer farmers as I haven't seen the actual quote from the guy who supposedly made that idiotic statement about when the wild deer are gone. But we've been living with CWD for long time in the West. It is not one of those diseases that tends to wipe pout whole populations of deer. We have very strong deer and elk populations and CWD positive populations in most of the state.

Again not defending the idiocy of the deer farmer in question if he actually said that.

Robert
August 13, 2014, 12:53 AM
There is already a human form of mad cow or CWD. My father died from it in 2004. It is called CJD for short. Sorry H&H I know its not hunting related, but I wanted to share that information.

PM me if you would like to know more. Let's not derail the entire thread.

H&Hhunter
August 13, 2014, 01:52 AM
Correct Robert as you well know, it's a god awful way to die!

3212
August 13, 2014, 03:46 AM
The Andromeda Strain is science fiction.The Hot Zone is a true story.

3212
August 13, 2014, 10:35 AM
As far as transmission methods go, it is by urine,feces,and saliva deposited on soil that retains prions for decades.When other deer are exposed to this soil they can pick it up.A biologist has stated this is a 30 to 50 year epidemic.

buck460XVR
August 13, 2014, 11:10 AM
There is already a human form of mad cow or CWD. My father died from it in 2004. It is called CJD for short.


You are correct Robert. Sorry to her your dad suffered from the disease. At one time, like CWD, it was thought that Mad Cow was not transferable to humans. Either that prion mutated/evolved or the scientists were wrong. This is the main reason for panic with CWD and why thousands of deer carcasses were found strewn thruout the countryside here in Wisconsin, the first year after the disease was discovered here. Folks still wanted the thrill of the hunt, but did not want to risk their health and the health of their loved ones. Donated venison was at an all time high as folks refused to eat the meat themselves, but thought it okay to donate so others could eat it. Since then, CWD has become a common word, and the panic has subsided. At one time the DNR wanted every deer within verified CWD zones dead and gone. Land owners and hunters refused to do it with hopes another solution could be found. As of now the solution is to live with it, be careful with the handling of the meat and to do everything possible to prevent the spread. Still, many still illegally bait and feed in areas it is restricted and plant small food plots to attract and concentrate deer to small areas.

The Andromeda Strain is science fiction.The Hot Zone is a true story.

Again, most know that. But the Andromeda Strain is based on the fact that viruses and prions evolve and mutate. Again, the belief that the prion mutated originally and enabled it to be transferred to deer, and thus it may be able to mutate/evolve and at some point be transferred to humans, is only logical, and we as deer hunters must do whatever we can to prevent it's spread.


As far as transmission methods go, it is by urine,feces,and saliva deposited on soil that retains prions for decades.When other deer are exposed to this soil they can pick it up.A biologist has stated this is a 30 to 50 year epidemic.


3212, You are just repeating info given in the links and common knowledge. Studies show that the prions contained in the CNS and some other organs when deposited randomly leach into the soil and may be able to infect other deer. This chance, altho relatively small, can be further reduced by proper disposal. This is why the transfer of carcasses, and other parts are now restricted in many states. I would assume that over time this restrictions will become even more restrictive and implemented by all states. CWD was first discovered in the sixties in Colorado. This means this has already been a 50 year epidemic. It is not going away. There is no known practical and effective way to control it, at this time, other than by controlling deer concentrations and proper disposal of carcasses. Whinin' about deer farms isn't the solution. While some greedy deer farm owners may have contributed to the spread, so have some greedy hunters that insist on baiting and feeding. There's more than enough blame to go around.

Art Eatman
August 13, 2014, 12:51 PM
How about what could be called "natural crowding"? Back around 1968, I went jeeping around my grandfather's back pasture one night, five miles from Austin, spotlighting. I counted over fifty pairs of eyes shining in my spotlight.

A couple of years later, not far north of Ozona out in dry country, I had to slowly "ooze" through some fifty deer on the highway around midnight.

One evening near Blanco, I stopped and did a rough count of over a hundred deer in some farmer's oat patch.

Other such stories are common in central Texas.

buck460XVR
August 13, 2014, 01:22 PM
How about what could be called "natural crowding"? Back around 1968, I went jeeping around my grandfather's back pasture one night, five miles from Austin, spotlighting. I counted over fifty pairs of eyes shining in my spotlight.

A couple of years later, not far north of Ozona out in dry country, I had to slowly "ooze" through some fifty deer on the highway around midnight.

One evening near Blanco, I stopped and did a rough count of over a hundred deer in some farmer's oat patch.

Other such stories are common in central Texas.


This is why Wisconsin attempts to substantially reduce the numbers of deer in areas where CWD has been detected. Again, it's a disease of close proximity that seems to be transmitted only by direct contact. Even then, it is thought that it takes multiple contacts before the disease is transmitted.

Iffin my memory serves me correctly, sixty years ago, there were only about 250,000 deer in Texas. Thus the probability of the transmission of this type of disease was relatively low. Now the numbers are up over 4 million deer and most of them concentrated in relatively small areas managed especially for deer production. Not really "natural crowding". The use of feeders is very prevalent, especially for hunting purposes. One wonders how much of this would change if and when CWD becomes a problem there.

3212
August 13, 2014, 04:14 PM
Well,My posts have encouraged some discussion.I would encourage everyone to do their own research and form their own opinions.Be sure to check the deer farming websites and the CWD websites.My own opinion is "whinin about deer farms" is necessary.By the way, I have never hunted over bait,salt blocks or any deer attractants.

buck460XVR
August 13, 2014, 05:47 PM
Well,My posts have encouraged some discussion.I would encourage everyone to do their own research and form their own opinions.Be sure to check the deer farming websites and the CWD websites.My own opinion is "whinin about deer farms" is necessary.By the way, I have never hunted over bait,salt blocks or any deer attractants.

I too encourage folks to become informed. Once CWD was discovered east of the Mississippi in Wisconsin 12 years ago, no state should have ignored the threat to their own deer herd. No hunter in these states should have thought it was never coming to their state. Opinions aren't the answer, knowing the facts are. As for your concern over the safety of meat from animals from a area shown to have the disease, facts show the meat is perfectly safe when handled correctly. The passing of the prion to other wild deer is likely to come from other wild deer, not game farm deer. Laying blame will not stop the spread of the disease, but certain precautions may. That is where folks need to concentrate their efforts. Funny, when CWD was first discovered here, the DNR banned the baiting and feeding of deer in the entire state. But after a coupla years because of all the negative feedback from the public that had become fond of watching Bambi at the backyard feeder or shooting their meat deer off a bait pile, they changed the regs so that only in counties where the disease has been found and those counties immediately adjacent to them are restricted. Once it was determined that the deer are safe to eat, folks were willing to take the risk of transmitting the disease to healthy animals just so they could continue to feed/bait them. Don't make sense to me. Problem with controlling CWD on game farm deer is that there is no reliable live animal test for CWD...yet, altho there has been positive results on elk and live testing. Thus unless you kill the animal, you don't know it is infected till it shows symptoms. Infected deer make take 18 months before they display symptoms. Then it is only matter of days or a coupla weeks before the animal perishes. This is why it is so hard to spot in wild animals. Add to this that many hunters in the field don't know the difference between a healthy animal and one that is sick. In areas like Texas where the norm is high concentrations of deer coming to feeders and bait stations, one wonders how much of that would change if CWD shows it self there.

Art Eatman
August 13, 2014, 10:17 PM
Surprisingly, buck, in two of the areas of which I spoke, the population growth resulted from too little hunting. Ranches broke up from death/inheritance, with heirs in many cases selling "ranchettes" to people who said, "Oh, I wouldn't hunt; I like to SEE deer."

In that particular west Texas example, I'd bet real money that the only time that feeders were used was during the two-month deer season. In dry times, what little rain falls runs off the pavement--and thus there is more food along the right-of-way than behind the pasture fence.

buck460XVR
August 14, 2014, 11:28 AM
Surprisingly, buck, in two of the areas of which I spoke, the population growth resulted from too little hunting. Ranches broke up from death/inheritance, with heirs in many cases selling "ranchettes" to people who said, "Oh, I wouldn't hunt; I like to SEE deer."

In that particular west Texas example, I'd bet real money that the only time that feeders were used was during the two-month deer season. In dry times, what little rain falls runs off the pavement--and thus there is more food along the right-of-way than behind the pasture fence.

Like around here, those same folks that don't hunt and "like to see deer" tend to feed those deer. Generally somewhere they can watch the deer from the house. Not only does this supplement the deers diet and increases the local population, it also concentrates those deer in a small area.....again increasing the risk of exposure to communicable diseases, not just CWD. In the northern part of our state, seems the only time you see deer is when you are close to a residence. Only time you see a road kill is in town. This is because of the sport of feeding and deer watching. Deer food is a big business there, one reason there was so much flak when the state first banned it statewide. $5 a bushel corn at the feed mill for farmers cost $20 a bag at the supermarket for the soccer moms feeding the deer in their backyard. At social gatherings, instead of pictures of their grand-kids, old folks proudly show pics of the deer in their backyard. This is what is so ironic. Folks think they are helping the deer, but are actually doing everything wrong.

While feeders may only be used for the two month season, it still is a highly used hunting technique. This makes me wonder if and when CWD is confirmed in Texas, if the hunters will quit using them for the good of the herd health, or like many around here, will ignore that risk and use them anyway.

95XL883
August 14, 2014, 12:01 PM
I hope I'm not hijacking this thread but I need some help understanding how feeding contributes to CWD. I ask because I bought 40 acres about 18 months ago. When a trail camera showed various skinny does and very few bucks I bought a feeder. The does gained weight. During the rut and winter it quickly attracted many deer, mostly does but there are at least five nice bucks (plus at least two others that weren't photographed) that showed during the rut. There were probably at least 15 different anterless deer showing up as well. My understanding is bucks have a small range of about a mile. Does have an even smaller range. That tells me these deer are all close and I need to thin this herd. (There is very little hunting pressure on the surrounding parcels.)

As an aside, as the seasons progressed and natural browse grew the number of deer visiting the feed has dropped dramatically to four regular does and an occasional wandering deer. I'm sure the deer are still close, they just have alternatives right now. As the alternatives dry up, I'm sure they will be back.

So the question is, what is considered a healthy number of deer for an area? I was thinking of putting in a food plot but obviously I want to minimize any chance of fostering CWD. (There is no CWD that I am aware of in southeast Kansas.)

Art Eatman
August 14, 2014, 12:52 PM
"...what is considered a healthy number of deer for an area?"

Basically, it's a function of the un-augmented carrying capacity on a year-in, year-out basis. Complex.

One problem is that of food area vs. non-food area. Varies a lot as to how much of which.

Local area wildlife biologists generally have the most accurate information about carrying capacity.

For one example, it might well be in eastern Texas that two or three acres could support a deer. Southwest Texas, maybe ten to twenty acres and even more.

(Between Pecos and El Paso, you can run as many head of cattle on a section of land as you get inches of rainfall. So, on average, a tad over a hundred acres per cow.)

95XL883
August 14, 2014, 02:39 PM
Thanks Art. While I'm not a rancher, my understanding is 1 cow per 6 acres. So 40 divide by 6 is 6 2/3. During the summer I'm in that range. Winter is another matter as I have a couple of pics with 12 anterless deer by the feeder at once. I just want to minimize any CWD chances. I really need to read more on CWD. I never heard of prions until this thread.

Art Eatman
August 14, 2014, 11:51 PM
Thinking back a bunch of years, the Austin area averages 32" of rainfall a year, long term. We ran a cow/calf to about six acres of open pasture. More rain, fewer acres per cow. Toward Houston, I've read of 1:1.

Which is why it's complex. :)

buck460XVR
August 15, 2014, 11:11 AM
I hope I'm not hijacking this thread but I need some help understanding how feeding contributes to CWD.


It's very simple. Again, it is a disease of close proximity that is thought to be passed by direct contact thru saliva, other body fluids and possibly by contact with the prions deposited on the ground thru urine, feces and random disposal of carcasses and other body parts. Feeders and baiting brings deer in close contact with each other continuously over a period of time in the same small area. Animals may eat a kernel of corn with saliva from another animal on it or one contaminated by contact with the ground. Many deer feeding in a small area brush up against each other constantly and butt and shove against each other for position and access to the food. Many deer in an area constantly also increase the amount of urine and feces deposited on the ground in that small area. Thus greatly increasing the odds of transmission between animals. In the wild, in most scenarios, you do not get this much constant close contact and congregation of animals in a small area for a long period of time, even when populations are higher than normal. Because there is no known vaccine or cure for CWD, and no way to reliably test animals without killing them, the only knows means of preventing the spread of the disease to to avoid putting deer at risk by not intentionally concentrating them is a small area over a period of time.

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