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Identification of virulence genes carried by bacteriophages obtained from clinically isolated methicillin-resistant Staphylococcus aureus.
Acta Microbiologica et Immunologica Hungarica ( IF 1.3 ) Pub Date : 2016-12-31 , DOI: 10.1556/030.63.2016.026
Djursun Karasartova 1 , Zeynep Burcin Cavusoglu 1 , Buse Turegun 1 , Murat T Ozsan 1 , Fikret Şahin 1
Affiliation  

Bacteriophages play an important role in the pathogenicity of Staphylococcus aureus (S. aureus) either by carrying accessory virulence factors or several superantigens. Despite their importance, there are not many studies showing the actual distribution of the virulence genes carried by the prophages obtained from the clinically isolated Staphylococcus. In this study, we investigated prophages obtained from methicillin-resistant S. aureus (MRSA) strains isolated from hospital- and community-associated (HA-CA) infections for the virulence factors. In the study, 43 phages isolated from 48 MRSA were investigated for carrying toxin genes including the sak, eta, lukF-PV, sea, selp, sek, seg, seq chp, and scn virulence genes using polymerase chain reaction (PCR) and Southern blot. Restriction fragment length polymorphism was used to analyze phage genomes to investigate the relationship between the phage profiles and the toxin genes' presence. MRSA strains isolated from HA infections tended to have higher prophage presence than the MRSA strains obtained from the CA infections (97% and 67%, respectively). The study showed that all the phages with the exception of one phage contained one or more virulence genes in their genomes with different combinations. The most common toxin genes found were sea (83%) followed by sek (77%) and seq (64%). The study indicates that prophages encode a significant proportion of MRSA virulence factors.

中文翻译:

鉴定从临床分离的耐甲氧西林金黄色葡萄球菌获得的噬菌体携带的毒力基因。

通过携带辅助毒力因子或几种超抗原,噬菌体在金黄色葡萄球菌(金黄色葡萄球菌)的致病性中起重要作用。尽管它们很重要,但很少有研究表明从临床分离的葡萄球菌获得的腐肉所携带的毒力基因的实际分布。在这项研究中,我们调查了从医院和社区相关(HA-CA)感染中分离出的耐甲氧西林金黄色葡萄球菌(MRSA)菌株的毒力因子。在这项研究中,使用聚合酶链反应(PCR)和Southern技术检测了从48个MRSA中分离出的43个噬菌体携带的毒素基因,包括sak,eta,lukF-PV,sea,selp,sek,seg,seq chp和scn毒力基因。污点。限制性片段长度多态性用于分析噬菌体基因组,以研究噬菌体谱与毒素基因的存在之间的关系。从HA感染中分离出的MRSA菌株倾向于比从CA感染中获得的MRSA菌株具有更高的原噬菌体存在率(分别为97%和67%)。研究表明,除一种噬菌体外,所有噬菌体在其基因组中均包含具有不同组合的一种或多种毒力基因。发现的最常见毒素基因是海(83%),其次是sek(77%)和seq(64%)。研究表明,前言编码了很大一部分的MRSA毒力因子。从HA感染中分离出的MRSA菌株倾向于比从CA感染中获得的MRSA菌株具有更高的原噬菌体存在率(分别为97%和67%)。研究表明,除一种噬菌体外,所有噬菌体在其基因组中均包含具有不同组合的一种或多种毒力基因。发现的最常见毒素基因是海(83%),其次是sek(77%)和seq(64%)。研究表明,前言编码了很大一部分的MRSA毒力因子。从HA感染中分离出的MRSA菌株倾向于比从CA感染中获得的MRSA菌株具有更高的原噬菌体存在率(分别为97%和67%)。研究表明,除一种噬菌体外,所有噬菌体在其基因组中均包含具有不同组合的一种或多种毒力基因。发现的最常见毒素基因是海(83%),其次是sek(77%)和seq(64%)。研究表明,前言编码了很大一部分的MRSA毒力因子。
更新日期:2020-08-21
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