What is Bovine Tuberculosis?
Bovine tuberculosis (TB) is a serious
disease caused by a bacterium that
mainly affects the respiratory system.
Bovine TB can infect most mammals,
including people. An eradication program
for bovine TB has been in effect in the US
since the early 1900’s. All states, except
zones within Texas and Michigan, are free
of TB in livestock. The discovery of TB in
wildlife in Michigan has been a major
setback for the eradication program.
Where is the Infection in Michigan?
In 1975, a wild white-tailed deer from
Alcona County was found infected with
bovine TB, and in 1994 an infected wild
white-tailed deer was found in Alpena
County. To assess the extent of infection,
wildlife and livestock surveys were done.
In 1995, bovine TB was determined to be
endemic in wild white-tailed deer in the
northeastern Lower Peninsula of Michigan.
Since 1995, about 35,000 deer statewide
have been tested for TB, and 281 deer
have been confirmed with TB-infection.
Bovine TB has also been found in
coyotes, raccoons, a black bear, a red fox
and a bobcat. Recently, deer infected
with bovine TB have been found outside
the known infected area.
EMERGENCY DISEASE PROGRAM ALERT
Animal Health and Food Safety Services
Animal Health Branch
Bovine Tuberculosis in Michigan
- February 2000 -
Map showing the Bovine TB
Affected Areas in Michigan
What is Michigan Doing?
The Michigan Department of Agriculture
(MDA) began testing all livestock in the
area where TB had been identified in deer.
They have tested more than 50,000 cattle
and goats on about 1,100 farms. Four
beef cattle herds and one captive deer
farm have been found infected with bovine
TB, and have been depopulated. A dairy
cattle herd has just been confirmed
affected with bovine TB, and an additional
beef cattle herd is awaiting final test
g Confirmed Infection
The area affected with bovine TB has been
quarantined by the MDA. This restricts
the movement of all livestock out of the
area. Michigan authorities