Page 34 - Microsoft Word -Cow Book 10-06-09 final update.doc

Item 1r

ABNORMAL MILK

REQUIREMENT - Lactating animals which show
evidence of the secretion of abnormal milk in one or
more quarters, based upon bacteriological, chemical, or
physical examination, shall be milked last or with
separate equipment and the milk shall be discarded.
Lactating animals producing contaminated milk, that is,
lactating animals which have been treated with, have
consumed chemical, medicinal or radioactive agents,
which are capable of being secreted in the milk and Rx
which, in the judgment of the Regulatory Agency, may
be deleterious to human health, shall be milked last or
with separate equipment and the milk disposed of as the regulatory agency may
direct.

Public Health Reason: A number of diseases of lactating animals including
salmonellosis, staphylococcal infection, and streptococcal infection may be
transmitted to humans through the consumption of milk. These organisms
may get into milk either directly from the udder or indirectly through infected
body discharges which may drop, splash or be blown into the milk. Bovine
mastitis is an inflammatory and, generally, highly communicable disease of the
udder and incites bacteria like streptococcus (type B) and staphylococcus.
Scarlet fever or septic sore throat, caused by hemolytic streptococci of human
origin may be shed into the milk by an infected udder. Recent organisms of
concern include E Coli, Listeria, and Yersinia. Healthy dairy animals are less
likely to be carriers of these organisms and require less drug treatment which
may get into the milk supply

NOTE: Drug residues in milk have become an item of high significance and
are a sensitive issue for both regulatory and the industry involved.

Some practices which may result in contamination of milk supplies may be:

1. Using common milking equipment (claws, hoses, etc,) to milk treated animals,
within the normal milking string, may lead to contamination.

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