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美國經(jīng)驗(yàn):不要把BVD帶到牛場_孕嬰童資訊中心-中嬰網(wǎng)

很多奶牛場主都有一個(gè)錯(cuò)誤的觀念,防止BVD(病毒性腹瀉)進(jìn)入牛場的方法就是用好的BVD疫苗來免疫奶牛。盡管疫苗注射對于預(yù)防該病的急性發(fā)作、降低持續(xù)感染(PI)犢牛的出現(xiàn)都有幫助,但疫苗注射本身并不能完全預(yù)防或控制BVD。同樣,檢測和清除持續(xù)感染的牛只只有在生物防疫完全做到位,并將BVD病毒帶到牛場的風(fēng)險(xiǎn)大大降低之后...
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