Blue Light Alone Does Not Reduce Acinetobacter baumannii Viability: Methylene Blue Photodynamic Therapy Using a Commercial Bilirubin Phototherapy System Produces Rapid Bacterial Killing

Q: What does this research mean for the field?

Methylene blue photodynamic therapy using a commercial bilirubin phototherapy system produces rapid killing of Acinetobacter baumannii, whereas blue light alone does not reduce bacterial viability. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Korry Wirth; Rachel A George; Jenna Ahn; Martin S. Pavelka; Robel T Beyene; Nicole A. Wilson; Timothy M. Baran

doi:10.1093/burnst/tkag061

September 4, 2026Burns & TraumaOpen Access

Blue Light Alone Does Not Reduce Acinetobacter baumannii Viability: Methylene Blue Photodynamic Therapy Using a Commercial Bilirubin Phototherapy System Produces Rapid Bacterial Killing

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Key Points

Determine the bactericidal efficacy of blue light alone versus methylene blue-mediated antimicrobial photodynamic therapy against Acinetobacter baumannii using a commercial bilirubin phototherapy system.
Irradiated Acinetobacter baumannii cultures with blue light alone using a commercial clinical bilirubin phototherapy unit.
Treated bacterial cultures with methylene blue photosensitizer followed by blue light exposure to evaluate photodynamic inactivation.
Blue light exposure alone produced no significant reduction in Acinetobacter baumannii viability.
Photodynamic therapy combining methylene blue with the commercial bilirubin phototherapy device induced rapid and robust bacterial killing.

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Implication

In vitro study reveals rapid killing of Acinetobacter baumannii by methylene blue phototherapy, suggesting clinical bilirubin lamps can eliminate resistant microbes.

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Wirth et al. (2026) studied this question.

synapsesocial.com/papers/6a9e8576c3034f961570d99e https://doi.org/10.1093/burnst/tkag061

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Blue Light Alone Does Not Reduce Acinetobacter baumannii Viability: Methylene Blue Photodynamic Therapy Using a Commercial Bilirubin Phototherapy System Produces Rapid Bacterial Killing

Key Points

No abstract yet

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Implication

Discussion

Cite This Study

Blue Light Alone Does Not Reduce Acinetobacter baumannii Viability: Methylene Blue Photodynamic Therapy Using a Commercial Bilirubin Phototherapy System Produces Rapid Bacterial Killing

Key Points

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Implication

Discussion

Cite This Study

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