Lancaster farming. (Lancaster, Pa., etc.) 1955-current, July 16, 1994, Image 32

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    BVD Update, Cattle Restraint, Milk System Management At Housing Expo
(Continued from Pago At)
tests of dead cattle.
What has caused a great deal of
concern is how difficult it has
become to treat BVD Type 2 virus.
While the Type 1 virus caused
diarrhea and some abortions, the
mutated Type 2 virus, present in
the current outbreak, is far more
serious and deadly.
“It’s something we hadn’t seen
before,” Sammons told the group.
For dairy farmers, treatment
must begin immediately. Two
shots of the “killed” Type 1 vac
cine are i required.
“With two shots of Type 1 (vac
cine), you get enough antibodies to
surround the Type 2 (virus) and
prevent it from killing the cow,”
said Sammons. “If you only give
(the cow) one shot, and Type 2 gets
in there, the body doesn’t recog
nize it as BVD in time to make
antibodies.”
Sammons indicated that no live
vaccine has been approved for
Type 2 B VD, but that several com
panies are working on it.
For infected herds, Sammons
said bringing new animals in from
sales has quickly led to the spread
of the disease. The disease is
spread from animal nose-to-nose.
Although it is possible that people
can spread the virus to the animals,
the person would practically have
Dr. Doug Reinemann, underneath pipes, provided a demonstration in properly
“tuning” a milk cleaning system check at the expo.
A demonstration of a cattle electric walk-through fly trap for the control of face,
stable, and horn flies was provided by Bob Bassler, manager, Clarksville facility, Uni
versity of Maryland, far left. The walk-through facility brushes off flies, which are then
terminated on sideline electrical arc wires.
No BVD Epidemic , But Concern Prevails
Reinemann indicated that a
common problem for clean
ing systems Is often too short
of a cycling time. Also, the
capacity of the milk pump is
often the controlling factor on
the formation and consisten
cy of the slug. Here, he
checks data on slug forma
tion In the pipeline.
to be covered by cow mucus and
saliva and then place another
cow’s nose into it.
The virus “won’t float through
the wind with the AI technician or
milk inspectors or whatever,” he
said.
But Sammons emphasized the
importance of good biosecurity
and keeping visitors to a limit on
farms.
The extent of the outbreak has
kept the state and federal agencies
from declaring the BVD outbreak
an “epidemic.” According to the
veterinarian, “If we can get more
than 70 percent of the cows vacci
nated twice in a given area, there
will not likely be an outbreak,
because the virus just doesn’t find
enough new cows to keep
spreading.”
Sammons indicated that veal
calf operations are at risk. “The
veal industry is indeed experienc
ing some BVD problems right
now,” he said. “But nobody ever
seems to know anything about veal
calves when you ask them.”
Horses and mules are not at risk
of contacting BVD.
Sammons said his company
uses a viral isolation blood test,
with samples sent to Cornell, to
detect both types of BVD. The cost
is about $S per animal.
Initially, the recent outbreak
affected IS herds of cattle in Mer
cer and Crawford counties. One
herd in Lancaster (two cows) are
suspected of having acute and
pathogenic BVD, according to a
release last week from the Pen
nsylvania Department of Agricul
ture’s Bureau of Animal Industry.
The release urged veterinary prac
titioners to help prevent further
spread of the disease by urging
clients to upgrade the BVD
7 /
Here, Reinemann uses a vacuum pressure meter to
gauge the formation of a milk system cleaning “slug" at the
Animal Housing Expo.
immune status of their herds by the
vaccination program and by dis
couraging the movement of sick or
exposed animals.
The release indicated that
clients should be advised to add to
their herds only BVD-vaccinated
animals from vaccinated herds that
have been free of clinical signs of
BVD for at least 30 days.
Right now, the state’s position
on county fairs and shows will
require the vaccination program,
two shots of the killed vaccine and
the second shot given at least two
weeks before the fair, said Sam
mons. All animals should be exa
mined when the come off the
truck.
“They’re not recommending
these fairs be cancelled, that the
All American or any of these
“There does not appear at this time to be an epidemic rip
ping through this area, but we need to be aware," said Dr.
Lynn Sammons, veterinarian from Willow Creek Animal
Hospital,. Reading. Sammons provided the latest Informa
tion about bovine viral diarrhea (BVD) In the region on Tues
day during the 1994 Animal Housing Expo.
shows be cancelled at this time,”
he said.
Butler County recently decided
to cancel its show and Clarion
County has restricted its cattle
show participation to entries from
county residents, according to a
story that appeared in last week’s
Lancaster Farming.
Sammons said that there was
only one confirmed herd in the
western Pennsylvania outbreak.
He indicated that four more herds
are strongly suspected, an addi
tional four are possible, and there
is one other single cow that’s
the extent of the outbreak as of
Tuesday.
“In western Pennsylvania, they
had a herd that lost SI out of 67
cows to this disease,’’ said
(Turn to Page A 33)