盲肠
粪便
厚壁菌
生物
微生物学
丰度(生态学)
动物科学
细菌
抗生素
兽医学
食品科学
生态学
16S核糖体RNA
遗传学
医学
作者
Yiwen Yang,Ningxue Chen,Sun Lan,Yu Zhang,Yinbao Wu,Yan Wang,Xindi Liao,Jiandui Mi
标识
DOI:10.1016/j.jhazmat.2021.125868
摘要
Comprehensive studies on the effects of cold stress on antibiotic resistance genes (ARGs) in the intestines and feces remain scarce. In this study, pigs were selected as the animal model and divided into a normal temperature group and a 48-h short-term cold stress group. The ARG profiles in fecal, cecal content and cecal mucosa samples were analyzed. The results showed that the normalized abundance of ARGs in the cecal mucosa samples in the cold stress group was significantly higher than that in the normal temperature group, while the normalized ARG abundances in the fecal and cecal content samples were significantly lower than those in the normal temperature group (P < 0.05). The bacterial community composition (especially Firmicutes) was the major driver impacting the ARG profile and accounted for 32.2% of the variation in the ARG profile, followed by metabolites (especially creatinine and oxypurinol) and mobile genetic elements (MGEs) (especially plasmids and insertion elements). And it was found that creatinine and oxypurinol can reduce the abundance of ARGs and Firmicutes in the in vitro experiment. The results indicate that short-term cold stress can reduce the abundance of ARGs in the cecum and feces of pigs, providing reference data for environmental safety.
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