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仔猪黄、白痢病是由致病性大肠杆菌引起的仔猪肠道传染病，该病分布广，发病急，死亡率高，危害大，已成为养猪业的重要障碍。致病性大肠杆菌的抗原构造复杂，血清型极多，不同型之间不能交叉保护。因此，至今国内尚没有广为适用的疫苗。又因该菌易产生抗药性，给药物治疗带来
Piglet yellow and white diarrhea are intestinal infectious diseases of piglet caused by pathogenic E.coli. The disease is widely distributed, acute onset, high mortality and great harm and has become an important obstacle in the pig industry. The pathogenic Escherichia coli antigen complex structure, a very large serotype, different types can not be cross-protected. Therefore, so far there is no widely applicable vaccine in China. Because of the bacteria prone to drug resistance, brought to the drug treatment