NEW YORK, N.Y. - The
f.S. Animal Health
ssociation’s brucellosis
committee has recom
mended some important
changes in the national
brucellosis eradication
program changes of
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USAHA recommends lower
sped*] interest to most beef
cattle raisers and dairymen.
One of the proposals would
greatly reduce the dosage of
Strain 19 vaccine used in
calves. Another would raise
the official age for calfhood
vaccination.
(Glenn Hade)
10355 Five forks Rd.
Waynesboro, PA 17268
Ph. (717) 762-4985
ATTENTION
AREA
FARMERS!
brucellosis vaccine dosages
These and other proposals
were made at the mid-year
meeting of the committee, in
July at Kansas City. Several
steps remain, however,
before the proposals can be
acted upon by the U.S.
Department of Agriculture.
Noting high interest in the
reduced dosage recom
mendations in particular,
Paul Becton, director of
brucellosis eradication for
USDA’s Animal and Plant
Health Inspection Service,
said “we’ll do everything we
can to speed the approval
process along.”
One of the first steps
towards approval will be a
review by the association’s
scientific advisory com
mittee. Then the
I
I
association’s executive
committee, including 50
state veterinarians and 25 to
30 allied industry officials,
will be polled by mail.
Meanwhile, USDA’s
biologists licensing and
standards officials will
review the results of
research conducted by
scientists at the National
Animal Disease Center,
Ames, lowa.
The preliminary data
examined by brucellosis
committee members in
dicated that reduced dosage
stimulates ample resistance
against brucellosis without
causing confusing levels of
antibodies in the blood.
One criticism of the
present standard dosage of
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They will be offering Read’s 1981
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Steel
Products
Lancaster Farming, Saturday, September 13,1980—C27
Strain 19 vaccine is that a
few animals develop per
sisting residual blood titers
after vaccination. This can
confuse blood test results
and interrupt sales,
especially when older calves
are vaccinated.
Titers are the
measurement of antibodies
resulting from vaccination
or infection with Brucella.
Titers induced by vac
cination using the reduced
dosage are lower and recede
very rapidly, yet the degree
of immunity is not
significantly different from
that produced by the current
dose.
“Being able to vaccinate
animals up to 12 months of
age without having to worry
about false reaction to blood
tests will be a great ad
vantage,” said Becton.
Currently, the official
calfhood vaccination ages
approved under program
standards are 2 to 6 months
for dairy breeds and 2 to 10
months for beef breeds. The
latter varies slightly m some
states. With reduced dosage,
the vaccination ages would
likely become 4 to 12 months
_??2.,
Agn Products for Agn Industry
PO Box 7343-A Birmingham, Alabama 35253
(205) 595-2181
P.O Box 325, 1308 Bobbit Drive,
Garner, North Carolina 27529 (919) 772-6130
for all breeds.
In high incidence states of
the Southeast and South
west, reduced dosage i a
already used on a limited
basis for adults in what is
called the whole-herd
vaccination plan. According
to Becton, these states
should have little problem
implementing reduced
dosage on a wide scale once
the go-ahead is given.
“This is important,’’ he
said, “since it may be two or
three years before vaccine
manufacturers could
prepare and label stan
dardized vaccine at the
reduced dosage for national
distribution.”
In other states, brucellosis
laboratories will have to
become proficient at doing
vaccine viability counts and
implementing other steps
necessary to make the
produce ready for use by
veterinarians and officials in
the field.
In all states, those who use
the vaccine will have to be
trained in proper handling to
assure that a high quality
vaccine is safely and ef
fectively administered.
READ
LANCASTER
FARMING
FOR COMPLETE
AND
UP-TO-DATE
MARKET
REPORTS