Milk, cream, and dairy products made from them offer ideal conditions for the
growth and survival of microorganisms. It is essential that milk be obtained
from animals free from diseases, and that all materials used in manufactured
dairy products be handled under sanitary conditions at all times to prevent
contamination with disease-producing and spoilage organisms. While
pasteurization offers a considerable safeguard against disease transmission,
contamination by workers suffering from disease, by rodents or by unclean
equipment or the addition of unpasteurized ingredients after pasteurization, can
create a serious health hazard. In a like manner, spoilage organisms, such as
undesirable bacteria, yeasts, and molds capable of causing decomposition of the
raw materials or of the finished products, may be contributed by insanitary
handling.
Products prepared from decomposed raw materials, undergoing active spoilage, or those contaminated with disease-producing organisms, are adulterated and subject to legal action.
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