—Lancaster Farming, Saturday, May 20,1978
32
Pseudorabies vaccine
CHARLES CITY, lowa. -
A new vaccme, a killed-virus
product, for swine
pseudorabies, has been
licensed by the Animal Plant
Health Inspection Service,
Salsbury Laboratories has
announced.
Developed by Salsbury,
the new product is the fust
killed-virus vaccine
federally licensed for PRV.
PRV is reported to cause
losses of up to $26 million per
year on the nation’s farms.
The killed-virus product
permits vaccination of
pregnant sows, enabling the
dam to pass immunity to the
newborn pigs through her
colostrum (first milk).
Salsbury claims immunity
transmitted by the vac
cinated sow lasts for several
weeks, the critical period
Protection from pseudorabies now begins with
the pigs’ first meal. Protective maternal antibodies
from the vaccinated sow are passed through the
colostrum to provide up to three weeks’ protec
tion.
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when PRV losses are the
greatest.
In laboratory tests sub
mitted for government
approval of the vaccine,
Salsbury showed 83 per cent
survival rate in pigs nursing
vaccinated sows compared
with nearly 10C per cent
mortality in pigs nursing
sows that had not been
vaccinated. All groups of
pigs had been challenged
with a highly virulent
(disease producing) virus.
More than 500 sows and 1,000
pigs were used in field trials
to determine the safety of
the vaccine.
Dale King, Salsbury
researcher and head of the
firm’s biological develop
ment, says that pigs
although acquiring passive
immunity from their
licensed
mother-can be successfully
vaccinated to extend their
protection.
Dr. James Cecil, Salsbury
veterinarian and swine
specialist, advises that
breeding stock should be
*
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routinely vaccinated with
the killed-virus pseudorabies
vaccine. He says pregnant
sows or gilts can be safely
vaccinated during each
pregnancy. If pseudorabies
has been reported in the
area, we strongly recom
mend the producer contact
his veterinarian im
mediately, Dr. Cecil said.
The new Salsbury
Pseudorabies Vaccine is the
result of several years of
continuing research to
produce a killed-virus
product, a safe vaccine for
swine of all ages.
More information is
available by contacting
Salsbury
Charles City, lowa, 50616,
phone 515-257-2422.