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Bacterial biofilm formation on stainless steel: exploring the capacity of Enterococcus spp. isolated from dairy products on AISI 316 L and AISI 304 L surfaces

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Abstract

This study aimed to investigate the ability of twelve strains of Enterococcus spp. to form biofilms on stainless steel (AISI 316 L and AISI 304 L) and to characterize the physicochemical properties of the bacterial and surface supports. The study also examined the auto-aggregation and extracellular polymeric substances of strains in both planktonic and sessile forms. The results showed that all Enterococcus spp. strains tested were capable of forming biofilms, with varying degrees reaching 7.41 log CFU/cm2 on AISI 316 L for Enterococcus mundtii A1. On AISI 304 L, the highest biofilm recorded was 7.01 log CFU/cm2 for Enterococcus mundtii A13. It was observed that auto-aggregation was influenced by the strains’ hydrophobicity. These results shed light on the possible application of Enterococcus spp. biofilm as a strategy to control pathogenic biofilms in various industries and provide insight into the role of physicochemical properties in biofilm formation.

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Abbreviations

LAB:

Lactic acid bacteria

GRAS:

Generally recognized as safe

MRS:

Man Rogosa and Sharpe

CFU:

Colony forming units

EPS:

Extracellular polymeric substances

PCA:

Principal component analysis

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Acknowledgments

The authors would like to express their gratitude to Mr. Mouhamed BOUROUACH from the Faculty of Science in Agadir for his valuable assistance with principal component analysis. We would also like to thank El Mostafa Hamadi for his meticulous proofreading and editing of this manuscript.

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Correspondence to Mariem Zanzan.

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Zanzan, M., Ezzaky, Y., Achemchem, F. et al. Bacterial biofilm formation on stainless steel: exploring the capacity of Enterococcus spp. isolated from dairy products on AISI 316 L and AISI 304 L surfaces. Biologia (2024). https://doi.org/10.1007/s11756-024-01630-8

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  • DOI: https://doi.org/10.1007/s11756-024-01630-8

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