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  • From: "wwfarm" <wwfarm@wiktel.com>
  • To: "Mounted search and rescue" <msar-riders@lists.ibiblio.org>
  • Subject: Re: [MSAR] West Nile Virus
  • Date: Fri, 15 Aug 2003 19:21:02 -0700

Here in MN we also have had problems with bred mares loosing their foals
after they were given the vaccine.

TERRY
----- Original Message -----
From: "Jorene Downs" <Jorene@CEOates.com>
To: "Mounted search and rescue" <msar-riders@lists.ibiblio.org>
Sent: Friday, August 15, 2003 4:59 PM
Subject: Re: [MSAR] West Nile Virus


> From: "Una Smith" <una@lanl.gov>
> > On Fri, Aug 15, 2003 at 02:50:51PM -0700, Jorene Downs wrote:
> > >WNV "problem" reports appear to be more related to horse breeding
> programs
> > >and the vaccine. (Unconfirmed rumor is the initial small test herd for
> the
> > >vaccine did not include any pregnant mares.)
> >
> > USDA has a statement about this, denying a statistical link
> > between vaccination and abortions:
> > http://www.aphis.usda.gov/lpa/issues/wnv/wnv_vaccine.html
>
> I found that link many months ago, early in the 2003 foaling / breeding
> season. The number of suspicious incidents related to equine reproduction
> (not just abortions, but deformities in foals) that have been reported
with
> possible links to the WNV vaccine has increased since USDA put that web
> page. I know people through horse discussion groups with seasoned "never
a
> problem" broodmares that came up empty after previously testing pregnant -
> in some cases multiple mares in the same broodmare band - with no reason
yet
> identified. Others report "never a problem" broodmares not conceiving,
with
> $thousands invested in testing and no reason indicated. No known changes
in
> the herd environment ... except for the use of WNV vaccine. Perhaps a
small
> percentage, but whatever the cause is, there are breeders in financial
> straits with inexplicably open mares and no return on their investment.
>
> The potential that the WNV vaccine might be related to reproductive
problems
> is obviously a topic of interest to breeders. I wouldn't hesitate to give
> the WNV vaccine to the general herd, but I'm not convinced it is entirely
> safe for the broodmares. As they state on their web site, USDA continues
to
> gather information. The only change I notice in that web page is USDA is
now
> openly encouraging email and phone calls from owners and vets who believe
> there may be a relationship between a problem and the WNV vaccine. If it
> develops there is a relationship, perhaps we'll get lucky and it is as
> simple as the timing of giving the vaccine as related to the reproductive
> timing.
>
> ~ ~ ~ ~ ~
> Jorene Downs
> Tulare Co, CA
> SAR, MSAR, Swiftwater Rescue, US&R,
> Technical Rescue, Cave Rescue,
> Hasty Team, ICP
> www.CEOates.com/sar
> Tulare-Kings CERT Program Coordinator
> www.tk-cert.org
>
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