Abstract
Antimicrobial resistance and biofilm production in healthcare-associated infections is a health issue worldwide. This study aimed to identify potential biomarker peaks for resistance or biofilm production in ESKAPE pathogens using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Antimicrobial susceptibility and biofilm production were assessed on selected isolates. Biomarker peaks were identified using MALDI Biotyper and ClinProTools software. Among resistant strains, 90.0 % were carbapenem-resistant Acinetobacter baumannii (CRAB), 39.0 % were methicillin-resistant Staphylococcus aureus (MRSA), 17.98 % were multidrug-resistant (MDR) Pseudomonas aeruginosa, 21.6 % were vancomycinresistant Enterococcus (VRE), and 2.55 % were carbapenem-resistant Enterobacterales (CRE). Biofilm production was 40.0 % in VRE and 45.8 % in MRSA. Although no potential biomarker peaks for biofilm production were detected, several potential biomarker peaks for drug resistance in VRE (n=5), MRSA (n=4), and MDR P. aeruginosa (n=4) were detected, suggesting avenues for the development of rapid diagnostic tools.
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