Dr. Kirby Lattwein Profile

Dr. Kirby Lattwein

at Erasmus MC

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Proceedings Article | 13 March 2024 Presentation

High-resolution optical imaging of infective endocarditis biofilms

Aaron Doug Deen, Antonio Lopez Marin, Gijs van Soest, Kirby Lattwein

Proceedings Volume 12819, 128190U (2024) https://doi.org/10.1117/12.3010254

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Bacterial infections inside the heart, called infective endocarditis, result in high mortality. The bacteria encase themselves within a biofilm, which shields them from treatment by drugs or devices, and makes it challenging to diagnose and confirm infection, despite technological advances. In this study, we investigate the use of optical coherence microscopy (OCM), a non-invasive imaging modality, as a potential tool to visualize biofilms on heart valves. Biofilms were grown on porcine heart valves in human plasma using clinical isolates of Staphylococcus aureus or Streptococcus gordonii. S. aureus biofilms were treated with a fibrinolytic to degrade and remove biofilms. Valves were imaged before and after biofilm growth using OCM followed by subsequent confocal laser scanning microscopy using fluorescent staining. The resolutions and imaging areas of the two microscopes were matched. A comparative analysis of the two techniques showed that OCM can accurately differentiate between areas with and without biofilm. Our findings highlight OCM as a tool for non-contact, label free imaging that can provide key morphological information for infection diagnosis and therapy guidance.

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