为评价菊苣酸改善猪德尔塔冠状病毒(PDCoV)感染仔猪后引起其的肠道菌群失衡,本研究设置菊苣酸组、菊苣酸+感染组、感染组和空白组的仔猪结肠内容物样品进行16S rRNA基因高通量测序(Illumina Mi Seq),利用生物信息学软件对各组仔猪肠道...为评价菊苣酸改善猪德尔塔冠状病毒(PDCoV)感染仔猪后引起其的肠道菌群失衡,本研究设置菊苣酸组、菊苣酸+感染组、感染组和空白组的仔猪结肠内容物样品进行16S rRNA基因高通量测序(Illumina Mi Seq),利用生物信息学软件对各组仔猪肠道微生物菌群多样性、菌群组成及物种差异进行分析。Alpha多样性分析显示,感染组仔猪结肠菌群多样性和丰度最低,菌群失衡;与感染组相比,菊苣酸+感染组仔猪结肠菌群多样性和丰度呈上升趋势。Beta多样性分析显示,菊苣酸+感染组的菌群结构与菊苣酸组、空白组相似,但与感染组存在差异。门、科、属、OUT水平的Venn分析显示,4个实验组中,菊苣酸组仔猪结肠菌群数量最多,感染组仔猪结肠菌群数量最少;菊苣酸+感染组仔猪结肠菌群数量与空白组相近。菌群群落组成分析显示,与空白组、菊苣酸组、菊苣酸+感染组相比,感染组仔猪的厚壁菌门(Firmicutes)、杆菌科(Lactobacillaceae)和乳杆菌属(Lactobacillus)的丰度呈升高趋势,拟杆菌门(Bacteroidota)的丰度降低趋势。菌群物种差异分析显示,互养菌门(Synergistota)的细菌丰度在空白组和菊苣组中呈显著增加,瘤胃球菌种(Ruminococcaceae)的细菌在感染组中的丰度最低。以上结果表明,仔猪口服菊苣酸后再以PDCoV感染,可改善PDCoV感染引起仔猪肠道菌群的失衡,恢复其肠道菌群的多样性和丰度。本研究为菊苣酸改善PDCoV感染引起仔猪肠道菌群的失衡提供了参考依据。展开更多
Porcine deltacoronavirus(PDCoV) is a newly identified virus that causes watery diarrhea in newborn piglets and results in significant economic losses to the pig industry. Since first reported in Hong Kong in 2012, PDC...Porcine deltacoronavirus(PDCoV) is a newly identified virus that causes watery diarrhea in newborn piglets and results in significant economic losses to the pig industry. Since first reported in Hong Kong in 2012, PDCoV has been subsequently detected in USA, South Korea, Thailand, and China's Mainland. Here we isolated a strain of PDCoV, named CHN-GD-2016,from the intestinal content of a diseased newborn piglet with severe diarrhea in a pig farm in Guangdong, China. PDCoV CHN-GD-2016 could be identified by immunofluorescence with PDCoV specific rabbit antisera, and typical crown-shaped particles with spiky surface projections of this PDCoV were observed with electron microscopy. Genomic analysis showed that the PDCoV CHN-GD-2016 was closely related to other Chinese PDCoV strains, with the highest sequence similarity with the strain CHN/Tianjin/2016. Importantly, inoculation of newborn piglets with 1×10~5 TCID_(50) of CHN-GD-2016 by oral feeding successfully reproduced clear clinical symptoms, including vomiting, dehydration, and severe diarrhea in piglets. In addition, the virus RNA in rectal swabs from 1 to 7 days post inoculation was detected, macroscopic and microscopic lesions in small intestine were observed, and viral antigen was also detected in the small intestines with immunohistochemical staining. Collectively, the data show in this study confirms that PDCoV is present in Guangdong,China and is highly pathogenic in newborn piglets.展开更多
文摘为评价菊苣酸改善猪德尔塔冠状病毒(PDCoV)感染仔猪后引起其的肠道菌群失衡,本研究设置菊苣酸组、菊苣酸+感染组、感染组和空白组的仔猪结肠内容物样品进行16S rRNA基因高通量测序(Illumina Mi Seq),利用生物信息学软件对各组仔猪肠道微生物菌群多样性、菌群组成及物种差异进行分析。Alpha多样性分析显示,感染组仔猪结肠菌群多样性和丰度最低,菌群失衡;与感染组相比,菊苣酸+感染组仔猪结肠菌群多样性和丰度呈上升趋势。Beta多样性分析显示,菊苣酸+感染组的菌群结构与菊苣酸组、空白组相似,但与感染组存在差异。门、科、属、OUT水平的Venn分析显示,4个实验组中,菊苣酸组仔猪结肠菌群数量最多,感染组仔猪结肠菌群数量最少;菊苣酸+感染组仔猪结肠菌群数量与空白组相近。菌群群落组成分析显示,与空白组、菊苣酸组、菊苣酸+感染组相比,感染组仔猪的厚壁菌门(Firmicutes)、杆菌科(Lactobacillaceae)和乳杆菌属(Lactobacillus)的丰度呈升高趋势,拟杆菌门(Bacteroidota)的丰度降低趋势。菌群物种差异分析显示,互养菌门(Synergistota)的细菌丰度在空白组和菊苣组中呈显著增加,瘤胃球菌种(Ruminococcaceae)的细菌在感染组中的丰度最低。以上结果表明,仔猪口服菊苣酸后再以PDCoV感染,可改善PDCoV感染引起仔猪肠道菌群的失衡,恢复其肠道菌群的多样性和丰度。本研究为菊苣酸改善PDCoV感染引起仔猪肠道菌群的失衡提供了参考依据。
基金supported by the National Key Research and Development Program (2016YFD0500101)
文摘Porcine deltacoronavirus(PDCoV) is a newly identified virus that causes watery diarrhea in newborn piglets and results in significant economic losses to the pig industry. Since first reported in Hong Kong in 2012, PDCoV has been subsequently detected in USA, South Korea, Thailand, and China's Mainland. Here we isolated a strain of PDCoV, named CHN-GD-2016,from the intestinal content of a diseased newborn piglet with severe diarrhea in a pig farm in Guangdong, China. PDCoV CHN-GD-2016 could be identified by immunofluorescence with PDCoV specific rabbit antisera, and typical crown-shaped particles with spiky surface projections of this PDCoV were observed with electron microscopy. Genomic analysis showed that the PDCoV CHN-GD-2016 was closely related to other Chinese PDCoV strains, with the highest sequence similarity with the strain CHN/Tianjin/2016. Importantly, inoculation of newborn piglets with 1×10~5 TCID_(50) of CHN-GD-2016 by oral feeding successfully reproduced clear clinical symptoms, including vomiting, dehydration, and severe diarrhea in piglets. In addition, the virus RNA in rectal swabs from 1 to 7 days post inoculation was detected, macroscopic and microscopic lesions in small intestine were observed, and viral antigen was also detected in the small intestines with immunohistochemical staining. Collectively, the data show in this study confirms that PDCoV is present in Guangdong,China and is highly pathogenic in newborn piglets.
