Koibuchi H, Fujii Y, Sato’o Y, Mochizuki T, Yamada T, Cui L, Taniguchi N. Inhibitory effects of ultrasound irradiation on Staphylococcus epidermidis biofilm.
J Med Ultrason (2001) 2021;
48:439-448. [PMID:
34410547 PMCID:
PMC8578078 DOI:
10.1007/s10396-021-01120-3]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 07/02/2021] [Indexed: 01/01/2023]
Abstract
PURPOSE
We aimed to investigate whether low-intensity continuous and pulsed wave ultrasound (US) irradiation can inhibit the formation of Staphylococcus epidermidis biofilms, for potential application in the treatment of catheter-related bloodstream infections (CRBSI).
METHODS
S. epidermidis biofilms that formed on the bottom surfaces of 6-well plates were irradiated on the bottom surface using the sound cell incubator system for different intervals of time.
RESULTS
US irradiation with continuous waves for 24 h notably inhibited biofilm formation (p < 0.01), but the same US irradiation for 12 h had no remarkable effect. Further, double US irradiation with pulsed waves for 20 min inhibited biofilm formation by 33.6%, nearly two-fold more than single US irradiation, which reduced it by 17.9%.
CONCLUSION
US irradiation of a lower intensity (ISATA = 6-29 mW/cm2) than used in a previous study and lower than recommended by the Food and Drug Administration shows potential for preventing CRBSI caused by bacterial biofilms.
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