建立了快速分离和检测引起仔猪腹泻的肠毒性大肠杆菌K88、K99和987P细菌细胞的毛细管区带电泳方法,并进行了腹泻仔猪粪便中肠毒性大肠杆菌的应用检测分析.结果表明,在电泳缓冲液为0.05 mol/L Na2CO3-NaHCO3(pH 9.9)、分离电压为14.1 kV、检测波长为210 nm的电泳条件下,E.coli K88、K99和987P的细胞分别具有单一、稳定的特征谱峰,其保留时间的相对标准偏差RSD≤0.9%;在确定的实验条件下,实现了腹泻仔猪粪便中肠毒性大肠杆菌的快速检测分析,发现将出生5 d～6 d的腹泻仔猪粪便引入培养基中增殖后主要检出K88,将出生30 d～35 d的腹泻仔猪粪便引入培养基中增殖后主要检出K99,将出生60 d左右的腹泻仔猪粪便引入培养基中增殖后未发现肠毒性大肠杆菌.
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