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Michigan Johne's Disease Control
Demonstration Project
Beef Herd 1
Characteristics
Risk Assessment
Testing Results
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Herd Characteristics at Time of Implementation of Johne's Disease Control Program
CATEGORY |
CHARACTERISTICS |
Breed |
Angus |
Housing |
Pasture |
Feed |
Round bales, corn silage |
Raise own replacements |
Yes |
Open or closed
herd |
Closed with the exception of
purchased bulls |
# Animals |
In 2005: 220 cows, 47 first
calf heifers, 60 bred heifers, 2 adult bulls, 2 yearling bulls
|
Breeding Program |
Artificial insemination and natural service. |
Calving |
One 5-acre calving pasture used for all cows. |
Colostrum feeding |
Single cow to calf. |
Management of
cattle that test positive for Johne's disease |
Not managed. |
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Risk
Assessment
When this herd began the Michigan Johne's Disease Control Demonstration
Project it was classified as high risk for continued Johne's
disease transmission in the calving area and moderate risk for transmission to weaned heifers for the following reasons:
- Multiple animals calved in same area
- Manure build-up was a risk for calf ingestion
- Johne's disease clinicals and supsects calved with other cows
- Heifers housed with cull cows in fall and winter
Major Risk Areas and Preventative Actions
Johne's
Disease Transmission Risk |
What's been
done to decrease risk |
Long-term
goal |
Multiple animal use of maternity pen. |
Removal of cow-calf pairs from calving
pasture ASAP, calve heifers in separate area from cows. |
|
Moderate risk of manure ingestion by calves
due to manure soiled udders and legs. Low risk for calf ingestion
of manure due to build-up in maternity pen. |
Not addressed.
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Cows suspected to have Johne's disease
are calved in same maternity pen as other cows. |
Johne's disease test positive cows calved
in separate area. |
. |
Moderate risk of manure contamination of
nursing calf feed by cows, traffic, splatter, equipment, or
people. |
Not addressed. |
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High risk of manure ingestion by weaned
heifers due to being housed with cull cows in fall and winter.
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Separation of cull cows from replacement
heifers. |
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Testing
Results
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