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波兰住院患者不同感染部位分离的耐甲氧西林金黄色葡萄球菌毒力决定因子的流行情况。

The prevalence of virulence determinants in methicillin-resistant Staphylococcus aureus isolated from different infections in hospitalized patients in Poland.

机构信息

Institute of Biological Sciences, Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 14 Bolesława Prusa Str., 08-110, Siedlce, Poland.

Institute of Biological Basis of Animal Production, Faculty of Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13, 20-950, Lublin, Poland.

出版信息

Sci Rep. 2022 Mar 31;12(1):5477. doi: 10.1038/s41598-022-09517-x.

Abstract

Methicillin-resistant Staphylococcus aureus (MRSA) is responsible for hard-to-treat infections. The presence of 19 virulence genes in 120 MRSA isolates obtained from hospitalized patients and genetic relationships of these isolates were investigated. The eno (100%) and ebps (93.3%) genes encoding laminin- and elastin binding proteins, respectively, were ubiquitous. Other adhesion genes: fib (77.5%), fnbB (41.6%), bbp (40.8%), cna (30.8%) encoding proteins binding fibrinogen, fibronectin, bone sialoprotein and collagen, respectively, and map/eap (62.5%), encoding Eap, were also frequent. The etB and etD genes, encoding exfoliative toxins, were present in 15.6% and 12.5% isolates, respectively. The splA, splE and sspA, encoding serine protease were detected in 100%, 70.8% and 94.2% isolates, respectively. The tst gene, encoding toxic shock syndrome toxin-1 was found in 75% isolates. The cna, map/eap and tst genes were the most common in wound isolates and much less common in blood isolates. We identified 45 different spa types, t003 (21.7%) and t008 (18.8%) being the most common. The t003 was the most frequent among isolates from the respiratory tract (35.5%), while t008 in blood isolates (40%). Identification of virulence factors of MRSA is important for evaluation of pathogen transmission rate and disease development.

摘要

耐甲氧西林金黄色葡萄球菌(MRSA)可导致治疗困难的感染。本研究调查了从住院患者中获得的 120 株 MRSA 分离株中 19 种毒力基因的存在情况及其遗传关系。编码层粘连蛋白结合蛋白和弹性蛋白结合蛋白的 eno(100%)和 ebps(93.3%)基因普遍存在。其他黏附基因:fib(77.5%)、fnbB(41.6%)、bbp(40.8%)、cna(30.8%)分别编码纤维蛋白原、纤维连接蛋白、骨唾液蛋白和胶原蛋白结合蛋白,以及 map/eap(62.5%),编码 Eap,也很常见。编码表皮剥脱毒素的 etB 和 etD 基因分别存在于 15.6%和 12.5%的分离株中。存在于 100%、70.8%和 94.2%分离株中的 splA、splE 和 sspA 基因分别编码丝氨酸蛋白酶。75%的分离株中发现了编码中毒性休克综合征毒素-1 的 tst 基因。cna、map/eap 和 tst 基因在伤口分离株中最常见,在血液分离株中则较少见。我们鉴定了 45 种不同的 spa 型,t003(21.7%)和 t008(18.8%)最为常见。t003 是呼吸道分离株中最常见的(35.5%),而 t008 是血液分离株中最常见的(40%)。鉴定 MRSA 的毒力因子对于评估病原体传播率和疾病发展非常重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1b1d/8971418/6111c6fc6322/41598_2022_9517_Fig1_HTML.jpg

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