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乳铁蛋白素B和天蚕素P1对投喂大肠杆菌断奶仔猪生长及肠道微生物区系的影响

DOI: 10.3969/j.issn.1006-267x.2011.09.012

Keywords: LfcinB,CecP1,ETEC,断奶仔猪,肠道,微生物区系

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Abstract:

本研究旨在探讨投喂大肠杆菌后乳铁蛋白素B(LfcinB)和天蚕素P1(CecP1)对断奶仔猪生长及肠道微生物区系影响。选用48头28日龄断奶的德国大白杂交二代断奶仔猪[(7.18±1.32)kg],根据体重、窝别、性别将其随机分成4组:对照组、产肠毒素组(ETEC)、乳铁蛋白素组(LfcinB)、天蚕素组(CecP1),每组2个重复,每个重复6头猪,试验期为12d。结果表明,1)试验期间对照组、ETEC组、LfcinB组、CecP1组仔猪体重及平均日增重均差异不显著(P>0.05)。2)ETEC组仔猪腹泻率显著高于其他组(P<0.05),而其他组之间差异不显著(P>0.05)。在进行第1次攻毒后,即仔猪29日龄,ETEC组、LfcinB组和CecP1组仔猪的粪便干物质均显著下降(P<0.05),第2次攻毒后的第2天,即仔猪31日龄,LfcinB组和CecP1组的仔猪分别饲喂了LfcinB和CecP1,对照组仔猪的粪便干物质仍显著高于ETEC组和LfcinB组(P<0.05),但已与CecP1组差异不显著(P>0.05)。3)各组仔猪的肠道微生物区系差异不显著(P>0.05)。由此可知,各组仔猪生长及肠道微生物区系差异不显著,但CecP1来源于猪肠道微生物寄生线虫,比LfcinB更能适应肠道环境,更有利于仔猪健康。

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