目的比较轮状病毒(RV)感染与健康儿童肠道菌群结构的差异,为临床治疗提供有价值的参考依据。方法采集20例RV感染及6例健康儿童粪便样品,提取粪便样品中细菌的混合DNA,先通过肠道菌重复性基因内一致性序列(ERIC)-聚合酶链反应(PCR)结合...目的比较轮状病毒(RV)感染与健康儿童肠道菌群结构的差异,为临床治疗提供有价值的参考依据。方法采集20例RV感染及6例健康儿童粪便样品,提取粪便样品中细菌的混合DNA,先通过肠道菌重复性基因内一致性序列(ERIC)-聚合酶链反应(PCR)结合分子杂交技术分析两组儿童之间肠道微生物组成的相似性;再扩增粪便样品中菌群的16 S rDNA基因V3区,利用PCR-TGGE技术分析肠道菌群的组成情况,研究两组儿童肠道微生物菌群组成的差异。结果肠道菌群的组成有很强的宿主专一性。RV感染与健康儿童相比,肠道菌群中糖皮质激素(GC)水平较低的细菌明显减少。微生态制剂治疗组温度梯度凝胶电泳(TGGE)条带数有一个逐渐增加的过程。结论轮状病毒感染时,可致患儿肠道菌群紊乱,但用抗生素治疗将更致肠道微生态失调,不利于患儿肠道菌群恢复,建议临床医师在轮状病毒感染时,慎用抗生素。展开更多
目的比较脉冲场凝胶电泳(pulsed field gel electrophoresis,PFGE)与肠杆菌科基因间重复序列聚合酶链式反应(enterobacterial repetitive intergenic consensus-polymerase chain reaction,ERICPCR)检测鲍曼不动杆菌同源性的结果差异。...目的比较脉冲场凝胶电泳(pulsed field gel electrophoresis,PFGE)与肠杆菌科基因间重复序列聚合酶链式反应(enterobacterial repetitive intergenic consensus-polymerase chain reaction,ERICPCR)检测鲍曼不动杆菌同源性的结果差异。方法分别采用PFGE和ERIC-PCR对我院院内分离的43株鲍曼不动杆菌进行分型检测。结果 43株鲍曼不动杆菌通过PFGE分型得出:A型22株、B型10株、C型3株、D型4株、E型2株、F型1株、G型1株;通过ERIC-PCR得出7种型别:Ⅰ型22株、Ⅱ型10株、Ⅲ型3株、Ⅳ型2株、V型3株、Ⅵ型1株、Ⅶ型2株。2种方法结果相符率为76.8%。我院鲍曼不动杆菌存在克隆株传播。结论 ERIC-PCR操作简便、结果可靠,与PFGE结果一致性高,2种分型方法均适合作为医院进行病原菌流行病学调查的分型检测手段。展开更多
In order to reduce deleterious effect on environment,human health and facilities caused by original sulfides, more attention should be paid to biodesulfurization studying for fossil fuels. In this work, eight isolates...In order to reduce deleterious effect on environment,human health and facilities caused by original sulfides, more attention should be paid to biodesulfurization studying for fossil fuels. In this work, eight isolates were characterized by several DNA-based methods such as BOX element polymerase chain reaction( BOX-PCR), enterobacterial repetitive intergenic consensus( ERIC)-PCR and random amplification of polymorphic DNA( RAPD)-PCR. The desulfurization performance was determined by micro-coulometric method,Gibb's assay and barium sulfate test. It was found out that ERIC-PCR displays a much higher inter-strain heterogeneity compared with using BOX. The length of the primer didnot play the most important role in bacterial classification. The combination of the analysis of repetitive-sequence-based polymerase chain reaction ngerprinting and 16 S r DNA was able to provide more effective way in the separation and identification of bacteria.According to the analysis of 16 S r DNA,the more efficient desulfurization strain should belong to Klebsiella variicola.展开更多
文摘目的比较轮状病毒(RV)感染与健康儿童肠道菌群结构的差异,为临床治疗提供有价值的参考依据。方法采集20例RV感染及6例健康儿童粪便样品,提取粪便样品中细菌的混合DNA,先通过肠道菌重复性基因内一致性序列(ERIC)-聚合酶链反应(PCR)结合分子杂交技术分析两组儿童之间肠道微生物组成的相似性;再扩增粪便样品中菌群的16 S rDNA基因V3区,利用PCR-TGGE技术分析肠道菌群的组成情况,研究两组儿童肠道微生物菌群组成的差异。结果肠道菌群的组成有很强的宿主专一性。RV感染与健康儿童相比,肠道菌群中糖皮质激素(GC)水平较低的细菌明显减少。微生态制剂治疗组温度梯度凝胶电泳(TGGE)条带数有一个逐渐增加的过程。结论轮状病毒感染时,可致患儿肠道菌群紊乱,但用抗生素治疗将更致肠道微生态失调,不利于患儿肠道菌群恢复,建议临床医师在轮状病毒感染时,慎用抗生素。
基金National Natural Science Foundations of China(Nos.41302079,21176145)Project of Shandong Province Higher Educational Science and Technology Program,China(No.J13LD54)
文摘In order to reduce deleterious effect on environment,human health and facilities caused by original sulfides, more attention should be paid to biodesulfurization studying for fossil fuels. In this work, eight isolates were characterized by several DNA-based methods such as BOX element polymerase chain reaction( BOX-PCR), enterobacterial repetitive intergenic consensus( ERIC)-PCR and random amplification of polymorphic DNA( RAPD)-PCR. The desulfurization performance was determined by micro-coulometric method,Gibb's assay and barium sulfate test. It was found out that ERIC-PCR displays a much higher inter-strain heterogeneity compared with using BOX. The length of the primer didnot play the most important role in bacterial classification. The combination of the analysis of repetitive-sequence-based polymerase chain reaction ngerprinting and 16 S r DNA was able to provide more effective way in the separation and identification of bacteria.According to the analysis of 16 S r DNA,the more efficient desulfurization strain should belong to Klebsiella variicola.
