The aim of this study is to know the antimicrobial activity produced by Lactic Acid Bacteria (LAB) against Staphylococcus
aureus cause of dairy cow’s sub clinic mastitis. The antimicrobial is produced by LAB which isolate from cattle intestine or can
inhibit the growth Staphylococcus aureus, The failure of this bacteria growth was indicated by formation of clear zone surrounding
the colonies on Brain Heart Infusion Agar plate In Vitro The antimicrobial produced by Lactic Acid Bacteria developed to be used
for therapeutic of dairy cows sub clinic mastitis [1-3].
Keywords: Lactic acid bacteria, Staphylococcus aureus, sub clinic mastitis