Ultrasound Can Increase Biofilm Formation by and Spp

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2023 Mar 23

PMID 36950165

Authors

Angela Racioppo

Barbara Speranza

Clelia Altieri

Milena Sinigaglia

Maria Rosaria Corbo

Antonio Bevilacqua

Affiliations

Soon will be listed here.

Abstract

The main goal of this research was to study the effect of an Ultrasound (US) treatment on biofilm formation of (strains c19 and DSM 1055), subsp. DSM 10140, subsp. DSM 20219, and subsp. DSM 20088. From a methodological point of view, each microorganism was treated through six US treatments, different for the power (10, 30, or 50% of the net power, 130 W), the duration (2, 6, or 10 min) and the application of pulses (0 or 10 s). After the treatment, a biofilm of the strains was let to form on glass slides and the concentration of sessile cells was analyzed for 16 days. Biofilms formed by untreated microorganisms were used as controls. As a first result, it was found that US significantly increased the concentration of sessile cells of subsp. , while for some other strains US treatment could not affect the formation of biofilm while improving its stability, as found for DSM1055 after 16 days. The variable mainly involved in this positive effect of US was the duration of the treatment, as biofilm formation and stability were improved only for 2 min-treatments; on the other hand, the effect of power and pulses were strain-dependent. In conclusion, the results suggest practical implication of a US pre-treatment for various fields (improvement of adhesion of microorganisms useful in food or in the gut, biomedical and environmental industries), although further investigations are required to elucidate the mode of action.

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