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In vitro bactericidal effect of Nd:YAG laser on Actinomyces israelii

Lasers in Medical Science, ISSN: 0268-8921, Vol: 28, Issue: 4, Page: 1131-1135
2013
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Article Description

A bactericidal effect has been reported by the use of near-infrared laser light on both Gram-positive and Gram-negative bacteria. The aim of this study was to evaluate the effect of Nd:YAG laser on Actinomyces israelii, filamentous bacteria causing cervicofacial actinomycosis. Experiments were realized on bacterial cells in saline suspension or streaked on Mueller-Hinton (MH) agar plates with or without India ink. Laser application was performed in Eppendorf tubes with different powers and frequencies for 40 s; bacterial suspensions were then streaked on agar plates and incubated at 35 C in proper conditions for 5 days before colony enumeration. A reduction of colony number variable from 60.13 to 100 % for powers of 2, 4, and 6 W at 25-50 Hz of frequency was observed in comparison with growth control. For agar plates, laser application was performed with different powers at 50 Hz for 60 s. A growth inhibition was observed after 5 days of incubation on MH plates with powers of 6 W and on MH-ink plates with all applied powers. This preliminary study showed a bactericidal effect caused by Nd:YAG laser application worthy to be evaluated in further experiments in vivo. © 2012 Springer-Verlag London Ltd.

Bibliographic Details

Vescovi, Paolo; Conti, Stefania; Merigo, Elisabetta; Ciociola, Tecla; Polonelli, Luciano; Manfredi, Maddalena; Meleti, Marco; Fornaini, Carlo; Rocca, Jean-Paul; Nammour, S Amir

Springer Science and Business Media LLC

Medicine

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