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