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KMID : 0380420030270020069
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Journal of Prventive Veterinary Medicine
2003 Volume.27 No. 2 p.69 ~ p.76
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Effect on Milk Quality, Causative Agents and Control
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Fox, Laurence K.
Bohach, Gregory A./Lee, Sang-Un/Park, Kun-Taek/Park, Yong-Ho
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Abstract
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To summarize, mastitis infections attract white blood cells to move into the mammary gland. Their trafficking to the milk will cause a path of secretory cell destruction in their wake. This results in a leaky milk secretory system where components of the blood leak into the milk, reducing milk quality.
Control of both contagious and noncontagious pathogens is warranted. There is a need to monitor the mastitis situation as closely as possible, and to root out the problem when it occurs by looking for the fundamental break-down in control.
Mycoplasma mastitis seems to be increasing in prevalence. The best method to keep a hand on the pulse of the mycoplasma mastitis situation in a herd is to perform routine bulk tank milk cultures. The appearance of Mycoplasm sp. in the culture indicates that cows have mycoplasma mastitis. However, bulk tank milk cultures may yield false negative results. At times cows with mycoplasma mastitis may be shedding this pathogen at very low levels, not detectable in bulk tank milk. But with routine, perhaps weekly, bulk tank cultures, a dairy manager should feel confident that mycoplasma mastitis problems will be revealed. Once revealed, it is important that managers search and isolate infected cows, since mycoplasma mastitis is contagious. Yet the source of mycoplasma mastitis may not be exclusively the mammary gland. If future research definitively identifies different sources of this pathogen, such as colonization at other body sites, then new strategies need to be developed to control, and prevent, mycoplasma mastitis. The goal of mastitis control is illustrated in Table 1.
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