当前位置: X-MOL 学术Antibiotics › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Prevalence and Molecular Mechanisms of Carbapenem Resistance among Gram-Negative Bacilli in Three Hospitals of Northern Lebanon
Antibiotics ( IF 4.3 ) Pub Date : 2022-09-22 , DOI: 10.3390/antibiotics11101295
Mariam Rima 1, 2 , Saoussen Oueslati 1, 3 , Laura Dabos 1 , Dina Daaboul 1, 2 , Hassan Mallat 2 , Elie Bou Raad 4 , Marcel Achkar 5 , Osman Mawlawi 6 , Sandrine Bernabeu 1, 3 , Rémy A Bonnin 1, 7 , Delphine Girlich 1 , Marwan Osman 8, 9 , Monzer Hamze 2 , Thierry Naas 1, 3, 7
Affiliation  

Carbapenem resistance (CR) is an emerging health issue. Epidemiological surveys on carbapenem-resistant Gram-negative bacilli (CR-GNB) in Lebanon remain scarce. In this study, we determined the prevalence of CR-GNB isolated between 2015 to 2019 in three hospitals in northern Lebanon: 311 CR-Enterobacterales (out of 11210; 2.8%), 155 CR-Pseudomonas (out of 1034; 15%) and 106 CR- Acinetobacter (out of 184; 57.6%) were identified. CR mechanisms were determined for 146 randomly chosen isolates: the Carba NP test revealed an enzymatic resistance to carbapenems in 109 isolates (out of 146, 74.7%). Produced carbapenemases were evaluated by the NG-Test Carba5, NG-Test OXA-23 immunochromatographic assays and PCR. Carbapenemase-producing (CP) Enterobacterales expressed blaOXA-48-like, blaNDM-like and blaVIM-like genes and CP-Pseudomonas expressed blaIMP-like and blaVIM-like genes, whereas CP-Acinetobacter expressed blaOXA-23-like genes. The NG-Test Carba5 results were confirmed by PCR sequencing and revealed several variants, such as NDM-19, VIM-62 and OXA-162, never described so far in Lebanon. Isolates with discordant results were sequenced by WGS and highlighted novel variants of the natural oxacillinases of Pseudomonas aeruginosa: blaOXA-50-like genes. Their role in carbapenem resistance should be further studied. Overall, our findings highlight an alarming situation and encourage health care centers to establish performant registration systems that could help in limiting resistance spread.

中文翻译:

黎巴嫩北部三家医院革兰阴性杆菌中碳青霉烯类耐药发生率及分子机制

碳青霉烯类耐药性(CR)是一个新兴的健康问题。黎巴嫩对耐碳青霉烯类革兰氏阴性杆菌 (CR-GNB) 的流行病学调查仍然很少。在这项研究中,我们确定了 2015 年至 2019 年期间黎巴嫩北部三家医院分离出的 CR-GNB 的患病率:311 例 CR-肠杆菌属(11210 例;2.8%)、155 例 CR-假单胞菌(1034 例;15%)和鉴定出106 个 CR-不动杆菌(184 个;57.6%)。确定了 146 个随机选择的分离株的 CR 机制:Carba NP 测试显示 109 个分离株对碳青霉烯类具有酶抗性(在 146 个中,74.7%)。产生的碳青霉烯酶通过 NG-Test Carba5、NG-Test OXA-23 免疫色谱分析和 PCR 进行评估。产碳青霉烯酶 (CP)肠杆菌属表达bla OXA-48- like、bla NDM - like和bla VIM -like基因,CP-假单胞菌表达bla IMP - like和bla VIM -like基因,而CP-不动杆菌表达bla OXA-23- like基因。NG-Test Carba5 结果通过 PCR 测序得到证实,并揭示了迄今为止在黎巴嫩从未描述过的几种变体,例如 NDM-19、VIM-62 和 OXA-162。WGS 对结果不一致的分离株进行测序,并突出显示铜绿假单胞菌天然苯唑西林酶的新变体:blaOXA-50样基因。它们在碳青霉烯类耐药中的作用应进一步研究。总体而言,我们的研究结果突出了一个令人担忧的情况,并鼓励医疗保健中心建立有助于限制耐药性传播的高效注册系统。
更新日期:2022-09-23
down
wechat
bug