Application of Fourier transform infrared spectroscopy for real-time typing of Acinetobacter baumannii outbreak in intensive care unit

Abstract

Aim: Acinetobacter baumannii is a pathogen of serious concern, often exhibiting multiple antibiotic resistance, frequently associated with hospital outbreaks in intensive care units. A prompt detection and tracking of these isolates is crucial. Reference methods for typing (pulsed-field gel electrophoresis, whole-genome sequencing) are accurate, but expensive and time-consuming, therefore limited to retrospective analysis. Materials & methods: In this study, the application of the FTIR-based IR Biotyper® (IRBT) to track and monitor in real-time the spread of a multidrug-resistant A. baumannii outbreak was investigated. The index case and the multidrug-resistant  A. baumannii isolates collected in the following 3 weeks were investigated. Results: IR Biotyper® clustering results were fully confirmed by pulsed-field gel electrophoresis results. Conclusions: IR Biotyper represent a promising tool for real-time hospital hygiene, enabling a prompt and reliable typing.