<prompt> TRUE about bacterial mastitis isExclusively occurs is lactating breastsCleaningn babys mouth offers protectionMost commonly caused by staphylococcus aureusFluctuation is an early sign of breast abscess  <response>: Most cases are caused by S. aureus and, if hospital acquired, are likely to be penicillin resistant. Most common variety of mastitis. Ref : Bailey and love 26thE pg820 