Contagious Mastitis Organisms in Dairy Herds

A chart to assess the biosecurity risk of various factors for contagious organism transmission in dairy herds.
Contagious Mastitis Organisms in Dairy Herds - Articles


Biosecurity Risk Assessment - Contagious Organisms
Check most appropriate box
Low Risk

Moderate Risk

High Risk
Purchased herd replacements
Closed herd - no outside replacements.
Purchase animals, but mastitis screening tests are used.
Purchase with no screening tests.
Milking protocol
Single use cloth or paper towel.
Occasionally more than one cow dried per towel.
Routinely dry more than one cow per towel.
Milkers wear gloves
All milkers, every milking. Gloves sanitized frequently
Some milkers, or sometimes.
Less than ½ of milkers wear gloves and/or gloves are dirty.
Monitor mastitis cases using bacterial cultures
Cultures frequently
Culture just chronic cows.
Rarely culture.
Dry cow intra-mammary therapyAll quarters of all cows treated; good infusion techniques practiced.
75-100% of cows treated and/or no valid criteria for selecting cows to be treated.
<75% of cows treated and/od poor infusion techniques.
Teat dip efficacy and coverage
Effective dip used & good coverage.
Effective dip and fair skin coverage.
Questionable efficacy and poor coverage.
Bulk tank cultures
Routine culture as part of quality protocol.
Only culture when problems arise.
Rarely or never culture bulk tank.
Control of contagious mastitis organisms in heifers
Good fly control. Do not feed high SCC milk, or pasteurize. Check quarters soon after calving.
Fair fly control. Feed whole milk but not from high SCC cows.
Fly control poor to non-existand. High SCC milk fed w/o pasteurization.