Journal of Microbiology

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Characterization of Newly Isolated Bacteriophages Targeting Carbapenem-Resistant Klebsiella pneumoniae: Bokyung Kim, Shukho Kim, Yoon-Jung Choi, Minsang Shin, Jungmin Kim; J. Microbiol. 2024;62(12):1133-1153. Published online December 10, 2024; DOI: https://doi.org/10.1007/s12275-024-00180-7

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Abstract: Klebsiella pneumoniae, a Gram-negative opportunistic pathogen, is increasingly resistant to carbapenems in clinical settings. This growing problem necessitates the development of alternative antibiotics, with phage therapy being one promising option. In this study, we investigated novel phages targeting carbapenem-resistant Klebsiella pneumoniae (CRKP) and evaluated their lytic capacity against clinical isolates of CRKP. First, 23 CRKP clinical isolates were characterized using Multi-Locus Sequence Typing (MLST), carbapenemase test, string test, and capsule typing. MLST classified the 23 K. pneumoniae isolates into 10 sequence types (STs), with the capsule types divided into nine known and one unknown type. From sewage samples collected from a tertiary hospital, 38 phages were isolated. Phenotypic and genotypic characterization of these phages was performed using Random Amplification of Polymorphic DNA-PCR (RAPD-PCR), transmission electron microscopy (TEM), and whole genome sequencing (WGS) analysis. Host spectrum analysis revealed that each phage selectively lysed strains sharing the same STs as their hosts, indicating ST-specific activity. These phages were subtyped based on their host spectrum and RAPD-PCR, identifying nine and five groups, respectively. Fourteen phages were selected for further analysis using TEM and WGS, revealing 13 Myoviruses and one Podovirus. Genomic analysis grouped the phages into three clusters: one closely related to Alcyoneusvirus, one to Autographiviridae, and others to Straboviridae. Our results showed that the host spectrum of K. pneumoniae-specific phages corresponds to the STs of the host strain. These 14 novel phages also hold promise as valuable resources for phage therapy against CRKP.

Rapid determination of carbapenem resistance by low-cost colorimetric methods: Propidium Iodide and alamar blue staining: Jiyoon Choi , Jiwon Baek , Daehyuk Kweon , Kwan Soo Ko , Hyunjin Yoon; J. Microbiol. 2020;58(5):415-421. Published online March 28, 2020; DOI: https://doi.org/10.1007/s12275-020-9549-x

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Carbapenems are a class of β-lactam antibiotics with a broad antimicrobial activity spectrum. Owing to their sturdy structures resistant to most β-lactamases, they have been regarded as one of the last-resort antibiotics for combating multidrugresistant bacterial infections. However, the emergence of carbapenem resistance increases predominantly in nosocomial pathogens. To prevent spread of carbapenem resistance in early stages, it is imperative to develop rapid diagnostic tests that will substantially reduce the time and cost in determining carbapenem resistance. Thus, we devised a staining-based diagnostic method applicable to three different Gram-negative pathogens of Acinetobacter baumannii, Escherichia coli, and Klebsiella pneumoniae, all with the high potential to develop carbapenem resistance. Regardless of the resistance mechanisms presented by bacterial species and strains, double staining with propidium iodide (PI) and alamar blue (AB) identified resistant bacteria with an average sensitivity of 95.35%, 7 h after imipenem treatments in 343 clinical isolates. Among the three species tested, A. baumannii showed the highest diagnostic sensitivity of 98.46%. The PI and ABmediated staining method could be a promising diagnostic
method
with high-throughput efficacy and low cost.

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Xinyu Yao, Jinying Gao, Lanqiao Wang, Xiaoning Hou, Litao Ge, Xinxin Qin, Jiazhang Qiu, Xuming Deng, Wei Li, Jianfeng Wang
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Gold nanoparticle-DNA aptamer-assisted delivery of antimicrobial peptide effectively inhibits Acinetobacter baumannii infection in mice
Jaeyeong Park, Eunkyoung Shin, Ji-Hyun Yeom, Younkyung Choi, Minju Joo, Minho Lee, Je Hyeong Kim, Jeehyeon Bae, Kangseok Lee
Journal of Microbiology.2022; 60(1): 128. CrossRef
Rapid Determination of Antibiotic Resistance in Klebsiella pneumoniae by a Novel Antibiotic Susceptibility Testing Method Using SYBR Green I and Propidium Iodide Double Staining
Yabin Zhang, Weihua Fan, Chunhong Shao, Jiajia Wang, Yan Jin, Jing Shao, Ying Zhang, Yong Wang
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Analytical Chemistry.2021; 93(17): 6784. CrossRef

Acinetobacter chinensis, a novel Acinetobacter species, carrying blaNDM-1, recovered from hospital sewage: Yiyi Hu , Yu Feng , Jiayuan Qin , Xiaoxia Zhang , Zhiyong Zong; J. Microbiol. 2019;57(5):350-355. Published online February 26, 2019; DOI: https://doi.org/10.1007/s12275-019-8485-0

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Abstract

Two strains of the genus Acinetobacter, named WCHAc- 010005 and WCHAc010052, were isolated from hospital sewage at West China Hospital in Chengdu, China. The two strains were found to be resistant to carbapenems due to the presence of carbapenemase gene blaNDM-1. Based on the comparative analysis of the rpoB sequence, the two strains formed a strongly supported and internally coherent cluster (intracluster identity of 98.7%), which was clearly separated from all known Acinetobacter species (≤ 83.4%). The two strains also formed a tight and distinct cluster based on the genuswide comparison of whole-cell mass fingerprints generated by MALDI-TOF mass spectrometry. In addition, the combination of their ability to assimilate malonate but not benzoate, and the inability to grow at 37°C could distinguish the two strains from all known Acinetobacter species. The two strains were subjected to whole genome sequencing using both short-read Illumina HiSeq2500 platform and the longread MinION sequencer. The average nucleotide identity and in silico DNA-DNA hybridization value between the genomes of WCHAc010005 and WCHAc010052 was 96.69% and 74.3% respectively, whereas those between the two genomes and the known Acinetobacter species were < 80% and < 30%, respectively. Therefore, the two strains represent a novel species of the genus Acinetobacter, for which the name Acinetobacter chinensis sp. nov. is proposed, and the type strain is WCHAc- 010005T (= GDMCC 1.1232T = KCTC 62813T).

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Whole-Genome Analysis of Two Copies of bla_NDM-1 Gene Carrying Acinetobacter johnsonii Strain Acsw19 Isolated from Sichuan, China

Lingtong Tang, Wei Shen, Zhikun Zhang, Jingping Zhang, Guangxi Wang, Li Xiang, Junping She, Xiaoyan Hu, Guoyuan Zou, Baoli Zhu, Yingshun Zhou
Infection and Drug Resistance.2020; Volume 13: 855. CrossRef
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Comparison of virulence between matt and mucoid colonies of Klebsiella pneumoniae coproducing NDM-1 and OXA-232 isolated from a single patient: Haejeong Lee , Jin Yang Baek , So Yeon Kim , HyunJi Jo , KyeongJin Kang , Jae-Hoon Ko , Sun Young Cho , Doo Ryeon Chung , Kyong Ran Peck , Jae-Hoon Song , Kwan Soo Ko; J. Microbiol. 2018;56(9):665-672. Published online August 23, 2018; DOI: https://doi.org/10.1007/s12275-018-8130-3

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Abstract

Nine Klebsiella pneumoniae isolates coproducing NDM-1 and OXA-232 carbapenemases were successively isolated from a single patient. Although they were isolated simultaneously and were isogenic, they presented different colony phenotypes (matt and mucoid). All nine isolates were resistant to most antibiotics except colistin and fosfomycin. In addition, matt-type isolates were resistant to tigecycline. No differences were detected in the cps cluster sequences, except for the insertion of IS5 in the wzb gene of two matt-type isolates. In vitro virulence assays based on production of capsular polysaccharide, biofilm formation, and resistance to human serum indicated that the mucoid-type isolates were significantly more virulent than the matt-type. In addition, mucoid-type isolates showed higher survival rates than the matt-type ones in infection experiments in the fruit fly, suggesting a higher virulence of K. pneumoniae isolates with a mucoid phenotype. To our knowledge, this is the first report of K. pneumoniae colonies with different phenotypes being isolated from the same sample. In addition, we show that virulence varies with colony phenotype. Dissemination of K. pneumoniae isolates expressing both antibiotic resistance and high virulence would constitute a great threat.

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Research Support, Non-U.S. Gov'ts

Mutational inactivation of OprD in carbapenem-resistant Pseudomonas aeruginosa isolates from Korean hospitals: Chi Hyun Kim , Hee Young Kang , Bo Ra Kim , Hyejin Jeon , Yoo Chul Lee , Sang Hwa Lee , Je Chul Lee; J. Microbiol. 2016;54(1):44-49. Published online January 5, 2016; DOI: https://doi.org/10.1007/s12275-016-5562-5

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Abstract

This study investigated the mechanisms underlying the carbapenem resistance of bloodstream isolates of Pseudomonas aeruginosa obtained from two Korean hospitals. Of the 79 P. aeruginosa isolates, 22 and 21 were resistant to imipenem and meropenem, respectively. The 22 imipenem-resistant P. aeruginosa isolates were classified into 7 sequence types (STs) and 13 pulsotypes. Twelve imipenem-resistant isolates from one hospital were found to belong to the international clone ST111. Two imipenem-resistant P. aeruginosa ST235 isolates carried the blaIMP-6 gene, but the remaining 20 isolates did not produce carbapenemases. Mutations in the oprD gene and a related decrease in gene expression were found in 21 and 5 isolates, respectively. However, all imipenemresistant P. aeruginosa isolates showed no significant expression of OprD in the outer membrane as compared with that of carbapenem-susceptible PAO1 strain. Overexpression of genes associated with efflux pumps, including mexB, mexD, mexF, and mexY, was not found in any imipenem-resistant isolate. One imipenem-resistant P. aeruginosa isolate overexpressed the ampC gene. Our results show that the low permeability of drugs due to the mutational inactivation of OprD is primarily responsible for carbapenem resistance in bloodstream isolates of P. aeruginosa from Korean hospitals.

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Clonal Distribution and Its Association With the Carbapenem Resistance Mechanisms of Carbapenem-Non-Susceptible Pseudomonas aeruginosa Isolates From Korean Hospitals
Nayeong Kim, Seo Yeon Ko, Seong Yong Park, Seong Yeob Kim, Da Eun Lee, Ki Tae Kwon, Yu Kyung Kim, Je Chul Lee
Annals of Laboratory Medicine.2024; 44(5): 410. CrossRef
Recombinase-aided amplification assay for rapid detection of imipenem-resistant Pseudomonas aeruginosa and rifampin-resistant Pseudomonas aeruginosa
Yao Zhou, Ruiqing Shi, Liang Mu, Linlin Tian, Mengshan Zhou, Wenhan Lyu, Yaodong Chen
Frontiers in Cellular and Infection Microbiology.2024;[Epub] CrossRef
Genetic determinants of antimicrobial resistance in polymyxin B resistant Pseudomonas aeruginosa isolated from airways of patients with cystic fibrosis
Felipe A. Simão, Mila M. Almeida, Heloísa S. Rosa, Elizabeth A. Marques, Robson S. Leão
Brazilian Journal of Microbiology.2024; 55(2): 1415. CrossRef
Multiple Mechanisms Synergistically Induce Pseudomonas Aeruginosa Multiple Drug Resistance
Pei Dai, Fangyan Jiao, Lulu Yang, Ousman Bajinka, Khalid A. Abdelhalim, Guojun Wu, Yurong Tan
Microbiology Research.2023; 14(2): 627. CrossRef
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Micaela Santana Ramos, João Pedro Rueda Furlan, Lucas David Rodrigues dos Santos, Rafael da Silva Rosa, Eduardo Angelino Savazzi, Eliana Guedes Stehling
Environmental Monitoring and Assessment.2023;[Epub] CrossRef
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Mohadeseh Zarei Yazdeli, Ciamak Ghazaei, Seyed Alireza Seyed Ebrahimi, Maryam Arfaatabar, Hanieh Alipanah, Maryam Noori
International Journal of Infection.2021;[Epub] CrossRef
Exploring the success of Brazilian endemic clone Pseudomonas aeruginosa ST277 and its association with the CRISPR-Cas system type I-C
Melise Chaves Silveira, Cláudio Marcos Rocha-de-Souza, Rodolpho Mattos Albano, Ivson Cassiano de Oliveira Santos, Ana Paula D’Alincourt Carvalho-Assef
BMC Genomics.2020;[Epub] CrossRef
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Michael S. Sonnabend, Kristina Klein, Sina Beier, Angel Angelov, Robert Kluj, Christoph Mayer, Caspar Groß, Kathrin Hofmeister, Antonia Beuttner, Matthias Willmann, Silke Peter, Philipp Oberhettinger, Annika Schmidt, Ingo B. Autenrieth, Monika Schütz, Erw
Antimicrobial Agents and Chemotherapy.2020;[Epub] CrossRef
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Manju Suresh, Sinosh Skariyachan, Nithya Narayanan, Jayasree Pullampara Rajamma, Manish Kumar Panickassery Ramakrishnan
Microbial Drug Resistance.2020; 26(8): 869. CrossRef
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Analysis of Metallo-β-lactamases, oprD Mutation, and Multidrug Resistance of β-lactam Antibiotic-Resistant Strains of Pseudomonas aeruginosa Isolated from Southern China
Fei Li, Danna Chen, Lijuan Li, Dezhi Liang, Fengping Wang, Bashan Zhang
Current Microbiology.2020; 77(11): 3264. CrossRef
Detection of carbapenem resistance genes in Pseudomonas aeruginosa isolates with several phenotypic susceptibility profiles
Sara Morales, Marlon A Gallego, Johanna M Vanegas, J Natalia Jiménez
Ces Medicina.2018; 32(3): 203. CrossRef
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Gertrudis Horna, María López, Humberto Guerra, Yolanda Saénz, Joaquim Ruiz
Scientific Reports.2018;[Epub] CrossRef
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Supeng Yin, Ping Chen, Bo You, Yulong Zhang, Bei Jiang, Guangtao Huang, Zichen Yang, Yu Chen, Jing Chen, Zhiqiang Yuan, Yan Zhao, Ming Li, Fuquan Hu, Yali Gong, Yizhi Peng
Frontiers in Microbiology.2018;[Epub] CrossRef
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Frontiers in Microbiology.2018;[Epub] CrossRef
Whole-Cell-Based Assay To Evaluate Structure Permeation Relationships for Carbapenem Passage through the Pseudomonas aeruginosa Porin OprD
Ramkumar Iyer, Mark A. Sylvester, Camilo Velez-Vega, Ruben Tommasi, Thomas F. Durand-Reville, Alita A. Miller
ACS Infectious Diseases.2017; 3(4): 310. CrossRef
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Journal of Medical Microbiology .2017; 66(12): 1722. CrossRef
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Journal of Antimicrobial Chemotherapy.2017; 72(9): 2489. CrossRef
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Chi Hyun Kim, Je Chul Lee
Journal of Bacteriology and Virology.2016; 46(4): 213. CrossRef

Clonal Spread of Carbapenem Resistant Acinetobacter baumannii ST92 in a Chinese Hospital during a 6-Year Period: Lei Huang , Liying Sun , Yan Yan; J. Microbiol. 2013;51(1):113-117. Published online March 2, 2013; DOI: https://doi.org/10.1007/s12275-013-2341-4

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Abstract: The carbapenem resistance rate of Acinetobacter baumannii in our hospital has increased steadily since 2004. The molecular epidemiology of carbapenem resistant A. baumannii (CRAB) clinical isolates was characterized by multilocus sequence typing (MLST) and rep-PCR in parallel, with pandrug susceptible A. baumannii (PSAB) used as control. MLST was performed to determine the sequence types (STs), and eBURST algorithm was used to analyze their relatedness. Carbapenem resistance related genes (oxa-23, oxa-24, oxa-51, oxa-58, imp, vim, and adeB) were screened using Polymerase Chain Reaction (PCR) method. 23 STs were identified in the 65 included isolates, with ST92 being the predominant clone. PSAB clustered into more singletons than CRAB. The positivity of oxa-23 and adeB correlated with high level carbapenem resistance (MICIPM>32 mg/L, MICMEM>32 mg/L) of CRAB ST92 isolates in 2009, which was different from the resistance pattern (MICIPM≤4 mg/L, 8 mg/L ≤MICMEM≤16 mg/L) of CRAB ST92 isolates in 2004. These observations suggest that clonal spread of CRAB ST92 isolates longitudinally is the possible reason for carbapenem resistance rate increase and correlate with high level carbapenem resistance in our hospital.

Molecular Characterization of Pseudomonas aeruginosa Isolates Resistant to All Antimicrobial Agents, but Susceptible to Colistin, in Daegu, Korea: Yoo Chul Lee , Byung Jun Ahn , Jong Sook Jin , Jung Uk Kim , Sang Hwa Lee , Do Young Song , Won Kil Lee , Je Chul Lee; J. Microbiol. 2007;45(4):358-363.; DOI: https://doi.org/2560 [pii]

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Abstract: Multi-drug resistant Pseudomonas aeruginosa has been implicated in a variety of serious therapeutic problems in clinical environments. Among the 968 P. aeruginosa isolates obtained from two hospitals in Daegu, Korea, we acquired 17 isolates that were resistant to all available tested antimicrobial agents, with the exception of colistin (colistin-only sensitive). We characterized the antimicrobial susceptibilities, metallo-β-lactamases, and epidemiological relatedness among the colistin-only sensitive P. aeruginosa isolates. All colistin-only sensitive isolates were positive in the modified Hodge test and imipenem-EDTA synergy test, thereby indicating the production of metallo-β-lactamases. 11 isolates from the secondary hospital and six isolates from the tertiary teaching hospital harbored blaVIM-2 and blaIMP-1, respectively. The pulsed-field gel electrophoretic analysis of the SpeI-digested DNA from P. aeruginosa isolates indicated that two different clones of colistin-only sensitive P. aeruginosa originated from each hospital, and had spread within the hospital environment. Overall, colistin-only sensitive P. aeruginosa was detected in Korea for the first time, but no pan-drug resistant bacteria were identified. Nationwide surveillance is required in order to monitor the emergence of colistin-only sensitive or pan-drug resistant bacteria.

Outbreaks of Imipenem-Resistant Acinetobacter baumannii Producing Carbapenemases in Korea: Seok Hoon Jeong , Il Kwon Bae , Kwang Ok Park , Young Jun An , Seung Ghyu Sohn , Seon Ju Jang , Kwang Hoon Sung , Ki Suk Yang , Kyungwon Lee , Dongeun Young , Sang Hee Lee; J. Microbiol. 2006;44(4):423-431.; DOI: https://doi.org/2410 [pii]

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Abstract: Among 53 Acinetobacter baumannii isolates collected in 2004, nine imipenem-resistant isolates were obtained from clinical specimens taken from patients hospitalized in Busan, Korea. Nine carbapenemase-producing isolates were further investigated in order to determine the mechanisms underlying resistance. These isolates were then analyzed via antibiotic susceptibility testing, microbiological tests of carbapenemase activity, pI determination, transconjugation test, enterobacterial repetitive consensus (ERIC)-PCR, and DNA sequencing. One outbreak involved seven cases of infection by A. baumannii producing OXA-23 β-lactamase, and was found to have been caused by a single ERIC-PCR clone. During the study period, the other outbreak involved two cases of infection by A. baumannii producing IMP-1 β-lactamase. The two clones, one from each of the outbreaks, were characterized via a modified cloverleaf synergy test and an EDTA-disk synergy test. The isoelectric focusing of the crude bacterial extracts detected nitrocefin-positive bands with pI values of 6.65 (OXA-23) and 9.0 (IMP-1). The PCR amplification and characterization of the amplicons via direct sequencing showed that the clonal isolates harbored blaIMP-1 or blaOXA-23 determinants. The two clones were characterized by a multidrug resistance phenotype that remained unaltered throughout the outbreak. This resistance encompassed penicillins, extended-spectrum cephalosporins, carbapenems, monobactams, and aminoglycosides. These results appear to show that the imipenem resistance observed among nine Korean A. baumannii isolates could be attributed to the spread of an IMP-1- or OXA-23-producing clone. Our microbiological test of carbapenemase activity is a simple method for the screening of clinical isolates producing class D carbapenemase and/or class B metallo-β-lactamase, in order both to determine their clinical impact and to prevent further spread.

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