2011年6月27日星期一

The second way the bedded stall

Environmental mastitis is caused by bacteria from the environment that enters the mammary gland and causes inflammation. Environmental mastitis should not be confused with contagious mastitis, which is caused by bacteria spreading from humans and infected animals in the herd.

The first step in the start of environmental mastitis is contamination of the surface of the cow's udder and teats with dirt laden with environmental bacteria. Contamination of the skin of the udder occurs when the skin contacts mud, manure, bedding or other dirty materials laden with environmental bacteria. This contact or contamination most frequently occurs when the cow is resting on dirty bedding. Contamination can also occur when the udder contacts mud, standing water or manure-laden alleys. The second step of the infection process is the entrance of bacteria into the teat canal during or shortly after milking. The third step is the rapid growth of bacteria in the udder.

Since most contamination starts when a cow comes in contact with dirty bedding in her stall, we need to consider stall maintenance as a primary management intervention point. Bedding becomes contaminated with urine and manure in two primary ways. Before the cow lies down, she can track significant amounts of manure onto the bedding with her feet. This is especially true if the alley in which the cow has been walking is deep with manure.

The second way the bedded stall becomes contaminated is when the cow dungs in the stall. Once the rear of the stall is contaminated, the cow dirties her udder every time she lies down. The general management practice is to remove soiled bedding from the stall and to freshen it with clean bedding several times per day. If the bedding is organic, such as straw, corn stalks or sawdust, it is easy for the bacteria in the manure to be washed deeper by urine, contaminating larger amounts of bedding that the cow will come in contact with even as dirty surface bedding is removed. When urine mixes with the manure and bedding,We also offer customized chicken coop. all wet bedding is then a source of environmental mastitis. Organic bedding holds water and helps bacteria to survive. Small pieces of the wet bacteria-laden bedding can cling to the udder surface, surviving there for hours, and entering the teat during milking.is the 'solar panel revolution' upon us?

In warm weather, organic bedding supports the growth and survival of large numbers of environmental bacteria for long periods of time and contributes to higher infection rates as evidenced by elevated somatic cell counts in summer months.

Sand bedding has several advantages over organic bedding. Studies have shown that sawdust supports 10 times as many environmental bacteria on the surface of the bedding as does sand. Unlike sawdust,is the 'solar panel revolution' upon us? sand is neither a food nor a moisture source for bacteria. Sand can be recycled as bedding after being washed. Sand is more comfortable for cows. Because of the sand's density, it helps cool cows in the summertime. Cows will elect to use well-bedded sand stalls over well-bedded sawdust stalls, therefore, sand-bedded stalls must be more comfortable. Cows will drag less bedding from a well-constructed stall when sand is used properly.

If you think you are solving the bedding problem by having the cows outside in the summer, you may want to reconsider. Unless the cows are being grazed as part of an intensive rotational grazing program where they have access to fresh pasture each day, or you are using a rotational loafing lot system, you may have problems. In most pasture and exercise lots,How is TMJ pain treated? cows camp out under the few trees that exist. These areas are just as bad as or worse than dirty stalls when it comes to the bacteria contamination potential.

Cows that have access to streams are not only a problem for the environment, but they are also being exposed to numerous environmental pathogens that cause mastitis. Keep in mind that bacteria need three things to survive -- moisture, warm temperatures and a food supply. If we eliminate or minimize these external conditions, we have a fighting chance against environmental mastitis.When the stone sits in the kidney stone,

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