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zhu wen de fang kong cuo shi
Author(s): 
Pages: 117
Year: Issue:  2
Journal: Technical Advisor for Animal Husbandry

Abstract: 带毒种猪和野猪是引发猪瘟的主要根源.近年来,猪瘟病毒毒力不断增强,典型猪瘟有抬头趋势,免疫猪群发生猪瘟的数量越来越多见,猪瘟疫苗使用中出现了新问题.……
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