Seasons Bleatings - Feb06 - Scrapie and NAIS programs
The Scrapie Eradication
Program
The U.S. has been on a mission "to accelerate the eradication of
the fatal brain disease, scrapie, from the nation's sheep flocks and goat
herds. Their goal is for the nation to be Scrapie FREE by 2010.
The American Sheep Industry Association estimates that scrapie costs the
industry over $20 million each year in lost export sales, disposal costs for
offal, and lost productivity. " Scrapie is not transmittable to
humans, but is closely related to the more serious BSE (Mad Cow), which
IS. To receive free information on this program see
http://www.animalagriculture.org/scrapie/Scrapie.htm
The proposed National Animal
Identification System
In the last two months, the NAIS has been a hot
topic on the discussion lists with astounding amounts of misinformation being
circulated. For the straight scoop see this USDA site : http://animalid.aphis.usda.gov/nais/index.shtml .
It is hoped that this tracking system for the nation's livestock will
provide a tool to help protect U.S. breeders from the economic
devastation caused by an outbreak of disease like BSE (and other serious
disease) and designate U.S. livestock as the safest in the world to buy or
eat. At present, they are in the process of assigning premise IDs... and
still working with the various breed groups regarding methods of individual IDs
. You can get your premise ID online . Each state is a bit different,
but it is free in the state of Missouri.
HMFF Commitment to Herd Health
HMFF has been on the Scrapie program for years and all HMFF sheep and goats
bear tags that identify their origin. We also keep detailed pedigrees plus
health, production and travel records. We have received our NAIS premise ID and
are awaiting the final word on how livestock are to be tagged. Plans are in the
works to have all our rams tested for genetic resistance this year.(see below
for the ASI cost share program). It is important to me that the animals we
sell to you are healthy, vaccinated and in compliance with all
regulations to the best of my ability.
Scrapie Protection
Tips
Although extremely rare (16 known cases in the U.S.
since 1990) Scrapie can affect goats. For those of us who raise
both sheep and goats, we are at greater risk , because IF scrapie is found in a
mixed flock of sheep and goats, the goats will be removed along with all the
sheep in the inevitable cleanup program.
It is true that scrapie most often occurs in
black faced meat breeds, but that is no guarantee that it can not happen in
your white faced (or blackfaced) wool breeds. Scrapie irradication is
a top priority in the world right now and the U.S. is serious about stamping it
out. It is possible to identify sheep that are at the highest risk for
scrapie and also to identify those that are scrapie-resistant (although not
possible to test goats as yet). The American Sheep Industry has a
cost-share ram genotyping program. Breeders in all states are
eligible. to get the details on this program see www.sheepusa.org and click on the Ram
Genotyping link. A flock of certified resistant sheep would
certainly be a sales-plus.
There are also things we can do from a management
perspective. Scrapie is not an airborne disease. We know it is spread
through direct exposure to birthing fluids and/or the placenta. So with
kidding season coming up you may want to consider keeping your sheep and goats
separate. I, perhaps like many other breeders, run my sheep and goats
together during the winter to simplify my feeding and
kidding/lambing chores... but I may have to re-think this policy.
Since there is no proof that kidding is the ONLY time scrapie can be
transmitted, I may need to keep my sheep and goats completely separate to
protect them from each other... and hopefully exempt them from depopulation
should the worst scenario occur. This is a tough call perhaps, because of
the slim chance of occurance in my fiber oriented farm orientation (rather than
meat).
Here at HMFF , I am keeping the sheep and goats
separate in order to feed them separate feeds (for example sheep are not
supposed to get copper and goats need it)... but at birthing time they come into
the same maternity shed. One thing that I have determined to do is to
establish one half of the pens for sheep and the other half for the
goats... I already clean out and lime each stall between occupants, use
clean towels... but how about birthing equipment ? Instead of just
washing equipment, I will be adding a disinfectant solution to the routine. And
don't forget your hands! Soap and water access plus a disinfectant
handwash between cases should be routine. These steps may not save
me from a depopulation as far as the USDA is concerned , but they are
practical steps that anyone can take to prevent spread of disease.
Some other practical things we can do from a
management perspective might include these suggestions from an article by Gale
Johnson and published in the ASI newsletter:
1. maintain a closed ewe-flock
2. only buy ewes from certified flocks or
those with resistant genotypes
3. only buy resistant rams for use in the
flock
4. genotype the ewes within the flock and remove
those with susceptible genotypes whenever this is economically practical. (use
as a criteria when downsizing your flock)
Taking these precautions with your sheep may be
worthwhile because 15 of the 16 aforementioned scrapie positive goats had
an obvious association with sheep.... therefore the best way to protect your
goats is to protect your sheep. For more information about Scrapie from
the National Scrapie Education Initiative see www.animalagriculture.org/scrapie
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