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Impact of meropenem exposure on fluoroquinolone and carbapenem resistance in Pseudomonas aeruginosa infection in inpatients in a Japanese university hospital: Insights into oprD mutations and efflux pump overexpression.
J Glob Antimicrob Resist
January 2025
Department of Medicine, Division of Clinical Infectious Diseases, Showa University School of Medicine, Tokyo, Japan.
Objectives: In Pseudomonas aeruginosa isolates, emerging meropenem resistance beyond imipenem resistance has become a problem. In this study, we aimed to investigate the relationship between the in vivo acquisition of antimicrobial resistance in fluoroquinolone- and carbapenem-resistant P. aeruginosa clinical isolates, the underlying molecular mechanisms, and exposure to antimicrobial agents.
View Article and Find Full Text PDFPhysiological and transcriptomic analysis of the effect of overexpression of the NTPIP2;4 gene on drought tolerance in tobacco.
BMC Plant Biol
January 2025
College of Tobacco Science, Guizhou University, Guiyang, 550025, China.
Aquaporins are widely present in the plant kingdom and play important roles in plant response to abiotic adversity stresses such as water and temperature extremes. In this study, we investigated the regulatory role of NTPIP2;4 on drought tolerance in tobacco at physiological and transcriptional levels. In this experiment, we constructed an NtPIP2;4 overexpression vector and genetically transformed tobacco variety 'K326' to investigate the mechanism of NtPIP2;4 gene in regulating drought tolerance in tobacco at physiological and transcriptomic levels.
View Article and Find Full Text PDFPseudomonas aeruginosa T6SS secretes an oxygen-binding hemerythrin to facilitate competitive growth under microaerobic conditions.
Microbiol Res
January 2025
State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China. Electronic address:
Pseudomonas aeruginosa is a prominent respiratory pathogen in cystic fibrosis (CF) patients, thriving in the hypoxic airway mucus. Previous studies have established the role of the oxygen-binding hemerythrin, Mhr, in enhancing P. aeruginosa's fitness under microaerobic conditions.
View Article and Find Full Text PDFNon-carbapenem-producing carbapenem-resistant Pseudomonas aeruginosa in children: Risk factors, molecular epidemiology, and resistance mechanism.
J Infect Public Health
December 2024
Department of Nosocomial Infection Control, The Clinical Laboratory, Clinical Microbiology Laboratory, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China. Electronic address:
Background: The investigation into risk factors, molecular epidemiology, and resistance mechanisms of carbapenem-resistant Pseudomonas aeruginosa (CRPA) in pediatric populations in China is currently inadequate.
Methods: To assess epidemiology, molecular characteristics, and resistance mechanisms, virulence-associated genes were analyzed, alongside multi locus sequence typing (MLST), PCR, and qRT-PCR.
Finding: Multivariate analysis identified prolonged hospitalization (OR: 1.
Characterization of Enterobacterales growing on selective CPE screening plates with a focus on non-carbapenemase-producing strains.
Microbiol Spectr
January 2025
National Institute for Antibiotic Resistance and Infection Control, Israel Ministry of Health, Tel Aviv, Israel.
Unlabelled: Carbapenem-resistant Enterobacterales (CRE) are divided into two distinct groups: carbapenemase-producing (CPE) and non-carbapenemase-producing (non-CPE). The population of non-CPE growing on CPE selective plates during routine screening is usually not reported and is not well defined. This study aimed to characterize non-CPE isolates growing on those plates.
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