ULTRASONIC CHARACTERISTICS FOR GEL FORMATION IN THE CALIFORNIA MASTITIS TEST

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题名:	ULTRASONIC CHARACTERISTICS FOR GEL FORMATION IN THE CALIFORNIA MASTITIS TEST
作者:	Chen, Chien-Hsing Hung, Chih-Hsin Lee, Yu –Yao Chen, Xin-Lun
贡献者:	健康暨護理學院
日期:	2012
上传时间:	2012-11-06T07:57:39Z (UTC)
摘要:	Mastitis is one of the most serious and costly diseases affecting dairy cow production (Heringstad et al., 2000). Measurement of the somatic cell count (SCC) in raw milk is widely accepted as the most useful indirect indicator of mastitis and milk quality. SCC actually only can be counted in laboratories. To achieve a faster, but less accurate result, some farmers use a simple, inexpensive, cow-side test, known as the California Mastitis Test (CMT) (Schalm et al., 1957), to provide a qualitative estimate of SCC in the foremilk of individual cows or quarters. CMT is an indirect method to detect infected quarters on the farm based upon the reaction of special detergents with DNA of somatic cells and increasing the viscosity of the mixture which is proportional to the SCC, and an evaluation of the degree of gel formation is done by gently rotating CMT paddle. However, the interpretation can be subjective, and this might result in false positives and negatives.
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