数字农科院2.0

贝氏隐孢子虫及其与大肠杆菌共感染对雏鸡肠道菌群的影响

文献类型： 中文期刊

作者： 黄燕;陈宇;米荣升;左佳坤;王志豪;韩先干;刘永杰;陈兆国

作者机构：

关键词： 贝氏隐孢子虫; 禽致病性大肠杆菌; 16S rRNA; 肠道菌群; 混合感染

期刊名称：畜牧与兽医

ISSN： 0529-5130

年卷期： 2021 年 53.0 卷 10.0 期

页码：

收录情况： 北大核心（2020版） ; 农林核心（2020版） ; 科技核心（2020版）

摘要： 为调查贝氏隐孢子虫单独以及与禽致病性大肠杆菌合并感染对雏鸡肠道菌群的影响,将1日龄SPF级雏鸡分为隐孢子虫单独感染组（灌胃隐孢子虫1×106个/只）、隐孢子虫和大肠杆菌共感染组（肌注大肠杆菌2×106 CFU/只,同时灌胃隐孢子虫1×106个/只）与健康对照组,分别于接种后第3、9、15、21和27天采集新鲜粪便,提取DNA后进行16S rRNA高通量测序及生物信息学分析。结果显示,3组雏鸡肠道微生物相对丰度最高的门为厚壁菌门,其次为拟杆菌门和变形菌门。多样性分析表明,2组感染雏鸡的肠道菌群多样性降低,但隐孢子虫单独感染组较共感染组先恢复。从属水平分析发现,与健康对照组比较,共感染组的乳杆菌属丰度明显降低（P<0.05）,而大肠/志贺菌属则显著升高（P<0.05）,两者此消彼长。2感染组雏鸡肠道中的布劳特菌属和瘤胃球菌属伴随雏鸡日龄增长呈上升趋势,但相比健康对照组绝对丰度较低。以上结果表明,大肠杆菌的共感染可加剧隐孢子虫感染造成的雏鸡肠道微生物多样性和菌群结构的变化,这可能与采食量的改变以及对免疫力和代谢功能的影响有关。

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