Experienced cattle breeders know that brucellosis can
cause severe losses. The loss of calves is apparent. Not
so apparent are losses due to sterility and decreased milk
yield. Although important, losses to the livestock
industry are not the sole reason we are concerned about
brucellosis. There is no doubt as to the existence of a
disease in man, commonly known as undulant fever or
brucellosis, which is caused by Brucella organisms of
animal origin. Scientific evidence indicates that rarely,
if ever, does one human contact brucellosis from another
human. It appears, therefore, that prevention and control
of brucellosis in man is directly dependent upon its
control and eradication in domestic animals.
Cattle and swine are tested at slaughter for
brucellosis. Suspect animals require additional on farm
testing and epidemiology. For years, suspect animals have
resulted after administration of Strain 19 vaccine. This
has been a problem for cattle producers and animal health
officials.
A new vaccine, Strain RB-51, has been developed in an
attempt to reduce the number of vaccinated animals testing
suspect. Unlike Strain 19, Strain RB-51 doesn't appear to
create confusion with brucellosis tests. This will enable
states with infected herds to more easily move toward
"Free" status.
The Strain RB-51 is now the only approved vaccine for
brucellosis. Check with your state department of
agriculture for brucellosis vaccination requirements in
your state.
