01 Thursday October 2020
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Mastitis in Cattle

Mastitis in Cattle

Definition and Epidemiology:

  • Mastitis is inflammation of the mammary gland and is mostlydue to infection by bacterial or mycotic pathogens causing abnormal milk, changes in the udder.
  • Types of Mastitis are Subclinical, Clinical, Severe and Gangrenous mastitis.


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.