MALDI-TOF mass spectra of Enterococcus faecium isolates from the Institute of Medical Microbiology, Immunology and Hygiene (MIH) at the Technical University of Munich

This repository contains the MALDI-TOF mass spectra used in the study titled "Early detection of ampicillin susceptibility in Enterococcus faecium with MALDI-TOF MS and machine learning". The spectra were collected between August 2021 and May 2025 during routine diagnostic workflows at the Institute of Medical Microbiology, Immunology and Hygiene (MIH) at the Technical University of Munich. In total, the dataset includes spectra from 2,109 ampicillin-resistant and 303 ampicillin-susceptible E. faecium isolates. Folder structure: TUM_spectra├── preprocessed│ ├── ampicillin_resistant│ └── ampicillin_susceptible└── raw ├── ampicillin_resistant └── ampicillin_susceptible The data are organized in a top-level folder named "TUM_spectra", which includes two main subfolders: "raw" - unprocessed spectra "preprocessed" - square-root transformed, smoothed, baseline-corrected, intensity-normalized spectra. Each of these folders contains two subfolders for ampicillin-resistant and ampicillin-susceptible isolate spectra. Note: MS-UMG dataset spectra used in the same study are available at https://doi.org/10.5281/zenodo.13693799.