Staph. Aureus Mastitis
Where Do They Live?
In the quarters and on the teat skin of infected cows or heifers.
How Is Infection Spread?
During milking via hands, equipment and towels used for milking preparation.
Mainly subclinical (no changes in milk or signs in cow). A few cows repeatedly have clinical flare-ups.
Culture of milk samples. California mastitis test (CMT). Somatic cell counts (SCC) on individual cows.
Resistant to penicillin-type antibiotics. Most antibiotics fail to reach infected tissue and bacteria.
Estimated Cure Rates - Low
Note: Even lower cure rates can be expected for long-standing infections.
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