Bacteriostatic activity in cow's milk from udders infected with Streptococcus agalactiae and Staphylococcus aureus

Milk samples from infected udders contained more lactoperoxidase and more thiocyanate than before infection. Irritation of 10 quarters of 5 cows caused the increase in the bacteriostatic activity of milk. Bacteriostatic activity of milk from the udders infected with staphylococci dropped after several weeks of chronic mastitis.