Carolina dos Anjos,1,2 Vishakha Sabharwal,3 Soroush Shabahang,4 Gizem Dilara Ozdemir,4 Loc Truong,3 Yazdani B. Shaik-Dasthagirisaheb,3 Stephen Pelton,3 Tianhong Daihttps://orcid.org/0000-0001-8960-88964
1Wellman Ctr. for Photomedicine, Massachusetts General Hospital (United States) 2Harvard Medical School (United States) 3Boston Medical Ctr. (United States) 4 Wellman Ctr. for Photomedicine, Massachusetts General Hospital (United States)
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Tympanostomy tube otorrhea (TTO) is a frequent complication associated with tympanostomy tube (TT) insertion in young children. Despite the standard treatment using topical antibiotics, TTO is often persistent or recurrent due to biofilm development on TT. In this study, we developed a novel antimicrobial blue light (aBL; 405nm) activatable Optical-TT, which emits aBL from the entire TT surface to kill major otopathogens in biofilms on TT. Our preliminary results showed that the Optical-TT activated by aBL led to over 2.5-log10 CFU reduction in 120 h-old H. influenzae films and 48 h-old P. aeruginosa biofilms formed on TT after 30 J/cm2 aBL and in 48 h-old S. aureus biofilms formed on TT after 60 J/cm2, implying the potential of aBL-activable Optical-TT in the management of TTO. Animal studies using a chinchilla model of TTO are currently underway.
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Carolina dos Anjos, Vishakha Sabharwal, Soroush Shabahang, Gizem Dilara Ozdemir, Loc Truong, Yazdani B. Shaik-Dasthagirisaheb, Stephen Pelton, Tianhong Dai, "Antimicrobial blue light activatable optical-tympanostomy tube: a novel alternative to control tympanostomy tube otorrhea," Proc. SPIE PC12822, Photonic Diagnosis, Monitoring, Prevention, and Treatment of Infections and Inflammatory Diseases 2024, PC128220J (13 March 2024); https://doi.org/10.1117/12.3003562