Mastitis in cows

I recently spent the weekend at a farm and during milking a cow with mastitis had to be milked. The usual milking methods were used but the milk was put into a separate container to be given to the calves. The equipment also had to be steralised to prevent further cows getting mastitis because it is very contagious. I researched into mastitis in cows and I found that it is caused by bacteria entering through the teat canal. Treatment includes an infusion of antibiotic directly into the infected gland. The farm I was working at,however,was an organic farm so antibiotics are only used when absolutely necessary. The organic farming means that all animals must be fed with organic foods, this means that the foods cannot be created using pesticides or fertilisers.