Biofilm formation in food industries: A food safety concern

Srey, Sokunrotanak; Jahid, Iqbal Kabir; Ha, Sang‐Do

doi:10.1016/j.foodcont.2012.12.001

Cited by 813 publications

(561 citation statements)

References 187 publications

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“…Food contamination may occur at any stage of the production process and can result in contamination of the processing environment (Simões et al 2010, Srey et al 2013. It has been recognized that biofilms are a frequent source for infections and almost 80% of persistent bacterial infections in the United States were found to be associated with biofilms (Janssens et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Evaluation antibacterial and antibiofilm activity of the antimicrobial peptide P34 against Staphylococcus aureus and Enterococcus faecalis

Costa

Rossatto

Medeiros

et al. 2018

An. Acad. Bras. Ciênc.

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The adhesion ability of bacteria to abiotic surfaces has important implications in food industries, because these organisms can survive for long periods through the biofilm formation. They can be transferred from one place to another in the industry causing contamination of the food processing environment. In this study, the antibacterial and antibiofilm activities of the antimicrobial peptide P34, characterized as a bacteriocinlike substance (BLS P34) were tested against planktonic and sessile cells of Staphylococcus aureus and Enterococcus faecalis isolated from foods. The BLS P34 showed inhibitory effect against all planktonic cells of E. faecalis. The inhibition of biofilm formation and the eradication of pre-formed biofilm were evaluated with the crystal violet assay and with the reduction of 3-bromide [4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium. The BLS P34 promoted a reduction of percentage of adhered microbial cells on the surface, not being able to perform the complete elimination of biofilm formation. The metabolic activity of S. aureus biofilms decreased considerably between 41-95%. However, E. faecalis cells showed up metabolically stimulated. The BLS P34 has the potential antibiofilm for the species S. aureus. Studies suggest more detailed approaches to a better understanding of the interactions between the antimicrobial and bacterial cells within the biofilm structure.

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Section: Discussionmentioning

confidence: 99%

Evaluation antibacterial and antibiofilm activity of the antimicrobial peptide P34 against Staphylococcus aureus and Enterococcus faecalis

Costa

Rossatto

Medeiros

et al. 2018

An. Acad. Bras. Ciênc.

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“…Stagnation promotes bacterial accumulation, ultimately leading to biofouling (Manuel et al, 2010). Biofouling is a damaging problem, affecting the energetic efficiency of industrial processes, causing corrosion of the surfaces, decreasing product quality and eventually promoting the spread of pathogens and resistant infectious diseases (Costerton et al, 1999;Ludensky, 2003;Srey et al, 2013). In industrial settings, surface disinfection is usually focused on the use of biocides, aiming to inactivate the microorganisms (Cloete et al, 1998;Faille et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The effect of shear stress on the formation and removal of Bacillus cereus biofilms

Lemos

Mergulhão

Melo

et al. 2015

Food and Bioproducts Processing

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A b s t r a c tThe influence of the shear stress (rw) under which biofilms were formed was assessed on their susceptibility to removal when exposed to chemical and mechanical stresses. A rotating cylinder reactor was used to form biofilms, allowing the simulation of rw conditions similar to those found in industrial settings, particularly in areas with low rw like elbows, corners, valves and dead zones. Bacillus cereus was used as a model bacterium for biofilm formation.Biofilms were formed on AISI316 stainless steel cylinders under different rw (estimated at 0.02, 0.12 and 0.17 Pa) for 7 days. Some phenotypic characteristics, including thickness, biomass production, cellular density and extracellular proteins and polysaccharides content were assessed. Biofilm density was found to increase significantly with rw while the thickness decreased. Also, biofilms formed at 0.02 Pa had lowest biomass content, cell density and extracellular polysaccharide content. Those characteristics were not statistically different for the biofilms formed under 0.12 and 0.17 Pa.Ex situ tests were performed by treating the biofilms with the biocide benzyldimethyldodecyl ammonium chloride (BDMDAC), followed by exposure to increasing rw conditions, up to 1.84 Pa (whereas the maximum rw used during growth was 0.17 Pa). The biofilms formed under low rw were more resistant to removal caused by the BDMDAC action alone. Those formed under higher rw were more resistant to the mechanical and the combined chemical and mechanical treatments. The amount of biofilm remaining on the cylinders, after both treatments was statistically similar for biofilms formed under 0.12 and 0.17Pa. The resistance of biofilms to removal by mechanical treatment (alone and combined with BDMDAC) was related to the amount of matrix polysaccharides.However, none of the methods investigated were able to remove all the biofilm from the cylinders. IntroductionThere is a lack of efficient strategies to clean stagnant zones in industrial plants (Brooks and Flint, 2008). Crevices, corners, dead zones, valves or areas where the mixing rate is low are almost inevitable. Stagnation promotes bacterial accumulation, ultimately leading to biofouling (Manuel et al., 2010). Biofouling is a damaging problem, affecting the energetic efficiency of industrial processes, causing corrosion of the surfaces, decreasing product quality and eventually promoting the spread of pathogens and resistant infectious diseases (Costerton et al., 1999;Ludensky, 2003;Srey et al., 2013). In industrial settings, surface disinfection is usually focused on the use of biocides, aiming to inactivate the microorganisms (Cloete et al., 1998;Faille et al., 2013). Since biofilms are complex biological structures adhered to a sur-face, these strategies often fail, as the removal of biomass is neglected. Hence, cleaning the biomass from the surfaces is fundamental for controlling biofilm development (Flemming, 2011).In the biofilm formation process, the hydrodynamic conditions define the transport of the cells, oxyg...

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“…De uma forma geral, o processo de formação do biofilme sobre a superfície de um material ocorre em três etapas: (i) Transporte de células livres do meio líquido para uma superfície sólida e sua subsequente adsorção/adesão; (ii) Crescimento e divisão de células fixas à custa de nutrientes provenientes do líquido circundante (colonização), conjuntamente com a produção e excreção de Substâncias Poliméricas Extracelulares (EPS); e (iii) Fixação de células fúngicas flutuantes e outras partículas, contribuindo para o acúmulo do biofilme (crescimento) (SREY; JAHID; HA, 2013;TAN et al, 2014;XAVIER et al, 2003).…”

Section: Introductionunclassified

Estudo Comparativo De Hemoculturas E Cateteres Positivos Para Leveduras Do Gênero Candida De Origem Hospitalar

et al. 2016

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Biofilm formation in food industries: A food safety concern

Cited by 813 publications

References 187 publications

Evaluation antibacterial and antibiofilm activity of the antimicrobial peptide P34 against Staphylococcus aureus and Enterococcus faecalis

Evaluation antibacterial and antibiofilm activity of the antimicrobial peptide P34 against Staphylococcus aureus and Enterococcus faecalis

The effect of shear stress on the formation and removal of Bacillus cereus biofilms

Estudo Comparativo De Hemoculturas E Cateteres Positivos Para Leveduras Do Gênero Candida De Origem Hospitalar

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