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Updated: May 4, 2026

Rapid and Specific Detection of Acinetobacter baumannii Infections Using a Recombinase Polymerase Amplification/Cas12a-based System
Published on: April 25, 2025
[New clone of ST-187 Acinetobacter baumannii responsible for an outbreak in an intensive care unit]
Lucía Martínez-Lamas1, Lucía Constenla-Caramés1, Susana Otero-Fernández1
1Servicio de Microbiología e Parasitología, Complexo Hospitalario Universitario de Vigo, Vigo, Pontevedra, España.
Introduction:
An ICU-outbreak caused by a novel Acinetobacter baumannii clone is described.
Methods:
An active search of carriers and environmental reservoirs was carried out. Carbapenemases genes were studied using multiplex-PCR and genotypic analysis by rep-PCR, PFGE and MLST.
Results:
A total 26 infected patients and 10 carriers were identified. A.baumannii was recovered from infusion pumps, walls, floor and washbasins. Phenotypic/genotypic analysis showed clonal expansion of a unique clone ST-187 producer of type OXA-24 and OXA-51 carbapenemases.
Discussion:
This is the first outbreak caused by ST-187 (ECI/GCI) multiresistant A.baumannii.
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