Most mammary gland infections occur between milkings when an uninfected mammary gland comes in contact with highly contaminated bedding or other surfaces. In contrast to coliforms, whose population is highest on sawdust bedding, non-ag. strep. Chopped straw bedding will maintain a higher population of non-ag. strep. Other farm conditions that may increase the probability of non-ag. How widespread can non-ag.
Infections usually disappear, however, within one to three weeks alter calving.
Research suggests that approximately 50 percent of cows infected with non-ag. strep. will exhibit clinical signs of mastitis at some time. Most infections will have a duration of only a few weeks, compared to months or years for Strep. Close to 60 percent of infections generally last less than 30 days. About IS percent of non-ag. A major increase in non-ag.