The results reported in this paper are concerned with a trial of penicil lin streptomycin, cephalosporin and chemotrypsin in treatment of 47 clinical case of cattle mastitis with a distribution of infection in 165 quarters. The disease was due to strept. agalactiae in 5.4 percent, staph. aureus in 2.4 percent and strept. agalactiae and staph. aureus mixed infection in 92.1 percent. Cephalosporin plus chemotrypsin were found to be an effective chemo therapeutic agent against mastitis caused by strept. agalactiae and staph. aureus.
A significant increase in the values of lipid peroxidation and antioxidant enzymes in mastitic cows than normal ones.