Читать книгу Farm Animal Medicine and Surgery - Graham R Duncanson - Страница 213

• These are Staphylococcus aureus, Streptococcus dysgalactiae, S. agalactiae, Corynebacterium bovis, coagulase-negative Staphylococcus spp. (these often colonize the teat canal and are opportunist pathogens), Mycoplasma bovis, M. californicum and Mycoplasma spp.

• They cause inflammation and pain in the udder, as well pyrexia and painful and swollen hocks.

• A milk sample should be taken for culture and sensitivity before treatment is started and then this treatment can be modified when the results are known.

• Although short milk withhold periods are important in dairy cows, effective antibiotic treatment is more important in the long term, not only for the affected cow but also for the rest of the group -bearing in mind that these pathogens are contagious.

• It is important to use the same antibiotic administered into the mammary gland as is used parenterally.

• Mycoplasma spp. present in the udder are not controlled by antibiotics.

• NSAIDs are useful in treatment.

• Dexamethazone should be used with care, making sure that the cow is not pregnant and the organism is being controlled by the antibiotic.

• There is a vaccine available against S. aureus.