Brucellosis in cattle, water buffalo
and bison is caused almost exclusively by Brucella abortis, however, B. suis or
B. melitensis is occasionally implicated in some cattle herds. B. suis does
not appear to be contagious from cow to cow. Infection spreads rapidly and
causes many abortions in unvaccinated cattle. Natural transmission occurs
by ingestion of organisms, which are present in large numbers in aborted fetuses,
fetal membranes, and uterine discharges. Cattle may ingest contaminated feed
and water or lick contaminated genitals of other animals. Brucella has been
recovered from fetuses and manure that has remained in a cool environment for more
than 2 months. Abortion is the most obvious manifestation of infection, however,
calves may be stillborn or weak. Cows may retain placentas and show reduced
milk production. Diagnosis is based on bacteriology or serology. B.
abortus can be cultured from placenta but more conveniently in pure culture from
stomach and lungs of aborted fetus. Serum agglutination tests have been the
standard diagnostic method. Agglutination tests may also detect antibodies
in milk, whey, semen and plasma. An (ELISA) has been developed to detect antibodies
in milk and serum.
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|
Catalog Price |
Size
|
Price |
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Positive Plasma |
BBAAPP |
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|
Negative Plasma |
BBAANP |
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|
Positive Serum |
BBAAPS |
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|
Negative Serum |
BBAANS |
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|
Positive Control |
BBAAPC |
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|
Negative control |
BBAANC |
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|
High Calibrator |
BBAAHCb |
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|
Medium Calibrator |
BBAAMCb |
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|
Low Calibrator |
BBAALCb |
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