The primary output of a dairy business is milk, which is primarily produced as food for human use. Therefore, a dairy farmer must strive to increase the amount of milk produced by his or her dairy herd. In order for the milk to be fit for human consumption, the farmer must also make sure that it is produced in a clean and hygienic environment. From the perspective of public health, milk is an excellent medium for the development of bacteria and other microorganisms. As a result, milk that has been contaminated during production, handling, or marketing can readily offer a risk of disease to the general public.