Mastitis in Cattle

Mastitis in Cattle

Definition and Epidemiology:


Streptococci, Staphylococcus aureus, Streptococcus agalactiae, and Corynebacterium bovis, Coliforms and Mycoplasma spp.

Clinical sympotoms:

  1. Abnormal milk.
  2. Udder swelling, pain, redness, heat.
  3. Progress to necrosis with coldness of the affected area, bluish udder, exudation, and crepitation (in gangrenous mastitis).


  1. Clinical symptoms and case history.
  2. Bacterial culture to identify the causative agents.
  3. Antibacterial susceptibility testing.
  4. Treatment and Prevention:


In lactating cow:

  1. Oxytetracycline, injectable , 11 mg/kg is effective.
  2. Intramammary therapy (e.g. Penicillin, Amoxicillin, and Sulfonamides).
  3. Supportive treatment.
  4. Anti-inflammatory drugs (e.g. Dexamethasone injectable).
  5. All 4 quarters of infected cows should be treated.

In dry cow:

  1. Intramammary antibacterial (e.g.: Penicillin, Cloxacillin) at the end of lactation.
  2. Penicillin, Cloxacillin, Cephapirinin injectable, Ampicillin injectable or oral.
  3. In doubtful prognosis udder or quarter(s) amputation maybe recommended.