Detection of non-tuberculous mycobacteria and other bacterial pathogens in dental unit waterlines, 2024, Germany: a microbiological single-centre study

Background: spp. in DUWLs in one tertiary medical centre in Germany to evaluate their potential role as causative agents of infections linked to dental procedures. Methods: were identified using a GenoType line probe assay. We calculated frequencies and proportions of positive samples. Results: . Conclusion: The large proportion of NTM detection highlights the importance of frequent bacterial monitoring in DUWLs for enhanced water quality control, which is not commonly implemented. Further research is needed to address the clinical relevance of NTM in DUWL and to evaluate measures to improve patient safety, such as the use of various disinfectant methods to sustainably reduce NTM concentrations.