Publications by authors named "Niall Delappe"

Article Synopsis
  • Carbapenemase-producing Enterobacterales (CPE) are multidrug-resistant bacteria that can spread their resistance genes via mobile genetic elements, complicating infection control efforts.
  • A study in Galway, Ireland involved whole-genome sequencing of CPE samples from patients and wastewater to understand the distribution and characteristics of these organisms and their resistance genes.
  • Findings revealed that most resistance genes were found on plasmids, with specific plasmid types associated with different CPE strains, highlighting the genetic mechanisms facilitating the spread of resistance between humans and the environment.
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BackgroundThe war in Ukraine led to migration of Ukrainian people. Early 2022, several European national surveillance systems detected multidrug-resistant (MDR) bacteria related to Ukrainian patients.AimTo investigate the genomic epidemiology of New Delhi metallo-β-lactamase (NDM)-producing from Ukrainian patients among European countries.

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The increasing prevalence of extended-spectrum beta-lactamase (ESBL) producing Enterobacterales (ESBL-PE) and carbapenemase-producing Enterobacterales (CPE) is a major public health concern worldwide. Despite the associated risk of infection from gut colonisation with a resistant Enterobacterales, the incidence and duration of carriage in healthy individuals is poorly studied. This "persistence study" is the first in Ireland to assess the longitudinal carriage of ESBL-PE and CPE in healthy individuals.

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Whole genome sequencing data of 874 isolates carrying from 13 European Union/European Economic Area countries between 2012 and June 2022 showed the predominance of sequence types ST167, ST405, ST410, ST361 and ST648, and an increasing frequency of detection. Nearly a third (30.6%) of these isolates were associated with infections and more than half (58.

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The spread of carbapenemase-producing (CPE) is of major public health concern. The transmission dynamics of CPE in hospitals, particularly at the national level, are not well understood. Here, we describe a retrospective nationwide genomic surveillance study of CPE in Ireland between 2012 and 2017.

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The emergence and dissemination of mobile colistin resistance (mcr) genes across the globe poses a significant threat to public health, as colistin remains one of the last line treatment options for multi-drug resistant infections. Environmental samples (157 water and 157 wastewater) were collected in Ireland between 2018 and 2020. Samples collected were assessed for the presence of antimicrobial resistant bacteria using Brilliance ESBL, Brilliance CRE, mSuperCARBA and McConkey agar containing a ciprofloxacin disc.

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Hypervirulent Klebsiella pneumoniae has typically been associated with invasive, community-associated infections. This study describes the molecular, epidemiological and clinical characteristics of a cluster of carbapenemase-producing hypervirulent K. pneumoniae in the South-East of Ireland.

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The natural environment represents a complex reservoir of antibiotic-resistant bacteria as a consequence of different wastewater discharges including anthropogenic and agricultural. Therefore, the aim of this study was to examine sewage and waters across Ireland for the presence of antibiotic-resistant Enterobacterales. Samples were collected from the West, East and South of Ireland.

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Background: This report describes recurrent bloodstream and PICC (peripherally-inserted central catheter) line infection in an immunocompromised patient.

Presentation Of Case: A 64-year-old female with acute promyelocytic leukaemia presented during a non-neutropenic febrile episode, and was isolated from multiple PICC and peripheral blood cultures, and from the tip of the line on removal. The patient was treated with meropenem and a new PICC line was inserted after sterile blood cultures.

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is a major human foodborne pathogen that is prevalent in the natural environment and has a high case fatality rate. Whole genome sequencing (WGS) analysis has emerged as a valuable methodology for the classification of isolates and the identification of virulence islands that may influence infectivity. In this study, WGS was used to provide an insight into 25 isolates from cases of clinical infection in Ireland between 2013 and 2015.

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is a Gram-positive opportunistic pathogen that is the causative agent of listeriosis. Here, we report the draft genome sequences of 25 strains isolated from patients with clinical listeriosis in the Republic of Ireland between 2013 and 2015.

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Building a comprehensive knowledge base of the association of Listeria monocytogenes isolates across national food chains, clinical cases, and environments can play a key role in helping control the incidence of listeriosis. Today, many food chains cross national borders and are often shared by neighboring countries. This study characterized L.

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Listeria monocytogenes is an important foodborne human pathogen. Human infection is associated with high mortality rates. Epidemiological investigation and molecular subtyping can be useful in linking human illness with specific sources of infection.

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Background: In Ireland, salmonellosis is the second most common cause of bacterial gastroenteritis. A new electronic system for reporting (Computerised Infectious Disease Reporting--CIDR) of Salmonella cases was established in 2004. It collates clinical (and/or laboratory) data on confirmed and probable Salmonella cases.

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Resistance or susceptibility of Salmonella enterica to streptomycin is widely used as an epidemiological marker. However, there is no clear consensus on the interpretation of streptomycin susceptibility test results. Comparison of results obtained with the Clinical and Laboratory Standards Institute (CLSI) disk diffusion method, the minimum inhibitory concentration (MIC) determined by Etest and streptomycin resistance genotype for 90 isolates of S.

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Salmonella enterica serovar Typhimurium is frequently isolated from humans and animals. Phage typing is historically the first-line reference typing technique in Europe. It is rapid and convenient for laboratories with appropriate training and experience, and costs of consumables are low.

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During investigation of an episode of Salmonella enterica serovar Kedougou contamination of mushrooms, multiple closely related isolates were obtained from mushrooms and mushroom-growing materials. Contamination apparently originated from sugar beet lime, an alkaline material used in mushroom growing. No associated cases of human infection were detected.

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Objectives: To employ a combination of phenotypic and genotypic subspecies typing methods to aid in an epidemiological investigation of an outbreak of Salmonella bredeney involving ten persons.

Methods: Isolates were characterised by employing antibiogram typing, in addition to two genotyping techniques, including pulsed field gel electrophoresis (PFGE), random amplification of polymorphic DNA (RAPD) with two oligonucleotide primers.

Results: An outbreak of gastroenteritis associated with S.

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Shigella sonnei is a significant cause of gastroenteritis in both developing and industrialized countries. Definition of the diversity and antimicrobial susceptibility of S. sonnei isolates may be helpful in the management of individual cases and outbreaks.

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Salmonella enterica serotype Bredeney has emerged as the third most commonly identified serotype among human clinical isolates referred to the Irish National Salmonella Reference Laboratory in the years 1998 to 2000. A collection of 112 isolates of S. enterica serotype Bredeney collected during the period 1995 to 1999 from animal, food, and human sources from both Ireland and Northern Ireland were studied.

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