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   <subfield code="a">Ảnh hưởng của các chế phẩm vi khuẩn lactic, BIO- MOS và bye trên sự xuất hiện hội chứng têu chảy và sinh trưởng của heo con từ sơ sinh đến 60 ngày tuổi</subfield>
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   <subfield code="a">Do đặc điểm hệ thống tiêu hóa của heo con chưa phát triển hoàn chỉnh hệ thống enzym, hệ vi sinh vật có lợi ở đường ruột. Ngoài ra còn các yếu tố về quản lý, chăm sóc  chưa hợp lý, do stress, thức ăn, do nhiễm khuẩn đường ruột, đặc biệt là do vi khuẩn E. COli, trong điều kiện nuôi dưỡng chăm sóc không tốt hoặc heo cai sữa do stress vì thay đổi thức ăn sẽ phát triển, gây tỉ lệ hao hụt cao làm thiệt hại kinh tế cho người chăn nuôi. Khuynh hướng sinh học hiện nay là hạn chế sử dụng kháng sinh vì dễ gây rối loạn hệ vi sinh vật có lợi ở đường ruột, thay vào đó là sử dụng các chế phẩm sinh học gọi chung là probiotic nhằm cân bằng hệ vi sinh vật đường ruột, tăng độ acid trong đường ruột của heo con, bổ sung các enzym tiêu hóa vào thức ăn giúp hoàn thiện hệ thống tiêu hóa của heo con, giúp heo con tiêu hóa thức ăn tốt, kích thích tăng trưởng và hoạt động của hệ miễn dịch, hạn chế sự phát triển của các vi khuẩn E. coli.</subfield>
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