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phu_grassman: 金币+2, good. 2013-03-29 08:44:17
canfeng2008: 金币+10, 翻译EPI+1, ★★★★★最佳答案, 谢谢版主相助 2013-03-29 09:59:06
After tests in laboratory and in field, the flocks with immunity grew well and could resist infections from pathogenic E.coli. The percentage of egg production from egg chicken was not affected and Ecoli diseases were controlled. Also other diseases occurred in less frequency.
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