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Overexpression of KPC contributes to ceftazidime-avibactam heteroresistance in clinical isolates of carbapenem-resistant .
Front Cell Infect Microbiol
December 2024
Key Laboratory of Respiratory Disease, People's Hospital of Yangjiang, Yangjiang, China.
Ceftazidime-avibactam (CZA) is one of the effective antibiotics used for the treatment of carbapenem-resistant (CRKP) infections, but its resistance rate has increased recently. Previous studies have focused on the mechanisms of CZA resistance, while its heteroresistance in CRKP remains poorly understood. This study aimed to investigate the characteristics and mechanisms of CZA heteroresistance in CRKP isolates.
View Article and Find Full Text PDFPathogenic Burden, Antimicrobial Resistance Pattern and Clinical Outcome of Nosocomial Bloodstream Infections in Intensive Care Unit.
J Intensive Care Med
December 2024
Department of Critical Care and Anaesthesiology, All India Institute of Medical Sciences, Jodhpur, India.
Nosocomial bloodstream infections with multidrug-resistant microorganisms have become a common health threat in intensive care settings worldwide. Understanding antimicrobial resistance and the outcomes of these infections is crucial for addressing this issue. This study aimed to investigate the burden, antimicrobial resistance, and 28-day outcomes of nosocomial bloodstream infections in the intensive care unit.
View Article and Find Full Text PDFCharacterization of a Novel KPC-2 Variant, KPC-228, Conferring Resistance to Ceftazidime-Avibactam in an ST11-KL64 Hypervirulent Klebsiella pneumoniae.
Int J Antimicrob Agents
December 2024
Department of Clinical Laboratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China. Electronic address:
Article Synopsis
- The study investigates the mechanisms of resistance to ceftazidime-avibactam (CZA) in a hypervirulent strain of Klebsiella pneumoniae known as CRE146, which carries the bla gene.
- Researchers isolated twelve carbapenem-resistant Klebsiella pneumoniae strains from a single patient, employing whole genome sequencing and various pathogenicity tests to understand the virulence factors and resistance development.
- Findings revealed that the resistance was linked to drug exposure and involved specific genetic mutations in carbapenemase (KPC-228), with CRE146 showing high resistance to CZA while being more susceptible to other antibiotics like meropenem and imipenem.
Tracing the transmission of carbapenem-resistant Enterobacterales at the patient: ward environmental nexus.
Ann Clin Microbiol Antimicrob
December 2024
The Centre for Clinical Microbiology, University College London, London, UK.
Introduction: Colonisation and infection with Carbapenem-resistant Enterobacterales (CRE) in healthcare settings poses significant risks, especially for vulnerable patients. Genomic analysis can be used to trace transmission routes, supporting antimicrobial stewardship and informing infection control strategies. Here we used genomic analysis to track the movement and transmission of CREs within clinical and environmental samples.
View Article and Find Full Text PDFLarge, protracted, multispecies and multiclonal spread of VIM-type Metallo-ß-Lactamase-Producing Enterobacterales in an Italian Hospital.
J Hosp Infect
December 2024
Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy; Clinical Microbiology and Virology Unit, Careggi University Hospital, Florence, Italy. Electronic address:
Background: Carbapenem-resistant Enterobacterales, particularly those producing carbapenemases (CPE), pose a major threat to human health, being listed among critical-priority resistant pathogens by the World Health Organization.
Aim: In this study we report on a large nosocomial spread of CPE of different species producing VIM-type carbapenemases, and on the infection prevention and control measures thata were adopted to contrast the spread.
Methods: Conventional culture and molecular methods were used for detection and identification of VIM-positive CPE (VIM-CPE) causing infections or colonizing patients or present in environmental specimens.
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