Detection of carbapenem-resistant gram-negative bacilli in Japan using the fully automated bacterial testing device RAISUS S4

IF 3.7 3区 医学 Q2 INFECTIOUS DISEASES Journal of global antimicrobial resistance Pub Date : 2024-10-18 DOI:10.1016/j.jgar.2024.09.009
Yumiko Funashima , Rin Hamabe , Kei Tominaga , Kentaro Wakamatsu , Takahiro Yaguchi , Zenzo Nagasawa , Tsukuru Umemura
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Abstract

Objective

We investigated a rapid detection method for carbapenemase-producing gram-negative bacilli (CP-GNR) using meropenem (MEPM) to assess the efficiency of the antimicrobial susceptibility testing.

Methods

We used the function that can monitor the growth curve with the resistant bacteria monitoring function (RAISUS S4). Rapid detection of CP-GNR was performed using RAISUS S4 in two types of antimicrobial susceptibility testing, the RAISUS 18-hour method (18-h method) and RAISUS rapid method (rapid method) for Enterobacterales (F-GNR) and non-fermenting gram-negative bacilli (NF-GNR).

Results

When F-GNR were based on MEPM MIC ≥ 0.25 µg/mL, CP-GNR were detected with a sensitivity of 100% (58/58) for the 18-h method and 98.3% (57/58) for the rapid method; the shortest detection times were 5.3 and 4.0 h, respectively. When NF-GNR were based on MEPM MIC > 8 µg/mL, it was possible to detect CP-GNR with 100% sensitivity (58/58) in both methods. Furthermore, in the analysis using the 18-h method for monitoring resistant bacteria, when ≥ 2 µg/mL was used as the screening concentration for F-GNR, approximately 50% of the resistant genotypes, NDM, GES, and KPC, were detected in approximately 7 h However, detecting the IMP and VIM took 11–12 h

Conclusions

The 18-h and rapid methods with RAISUS S4 were highly correlated with the results of the microdilution method of CLSI, and CP-GNR detection was rapid using a function that can monitor the growth curve with RAISUS S4.
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使用全自动细菌检测设备 RAISUS S4 检测日本耐碳青霉烯革兰阴性杆菌。
目的我们研究了一种使用美罗培南(MEPM)快速检测产碳青霉烯酶革兰阴性杆菌(CP-GNR)的方法,以评估抗菌药敏感性检测的效率:方法:我们利用耐药菌监测功能(RAISUS S4)监测生长曲线。在 RAISUS 18 小时法(18-h 法)和 RAISUS 快速法(快速法)两种抗菌药敏感性检测中,使用 RAISUS S4 对肠杆菌(F-GNR)和非发酵革兰氏阴性杆菌(NF-GNR)进行了 CP-GNR 的快速检测:当 F-GNR 的 MEPM MIC ≥ 0.25 μg/mL 时,CP-GNR 的检测灵敏度为:18 h 法 100%(58/58),快速法 98.3%(57/58);最短检测时间分别为 5.3 和 4.0 h。当 NF-GNR 基于 MEPM MIC > 8 μg/mL 时,两种方法检测 CP-GNR 的灵敏度均为 100%(58/58)。此外,在使用 18 h 方法监测耐药菌的分析中,当 F-GNR 的筛选浓度≥ 2 µg/mL 时,约有 50%的耐药基因型(NDM、GES 和 KPC)在约 7 h 内被检测出来,但检测 IMP 和 VIM 则需要 11-12 h:RAISUS S4 的 18 小时快速方法与 CLSI 微稀释法的结果高度相关,使用 RAISUS S4 监测生长曲线的功能可快速检测 CP-GNR。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of global antimicrobial resistance
Journal of global antimicrobial resistance INFECTIOUS DISEASES-PHARMACOLOGY & PHARMACY
CiteScore
8.70
自引率
2.20%
发文量
285
审稿时长
34 weeks
期刊介绍: The Journal of Global Antimicrobial Resistance (JGAR) is a quarterly online journal run by an international Editorial Board that focuses on the global spread of antibiotic-resistant microbes. JGAR is a dedicated journal for all professionals working in research, health care, the environment and animal infection control, aiming to track the resistance threat worldwide and provides a single voice devoted to antimicrobial resistance (AMR). Featuring peer-reviewed and up to date research articles, reviews, short notes and hot topics JGAR covers the key topics related to antibacterial, antiviral, antifungal and antiparasitic resistance.
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