Significance of Bacterial Attachment

Palmer, John W.; Seale, Brent; Flint, Steve

doi:10.1002/9781118876282.ch2

Cited by 2 publications

(2 citation statements)

References 117 publications

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“…In the dairy industry, 304 stainless steel is the most common and accepted alloy in the surfaces and pipelines because of the sanitary standards and requirements (Astm International, 2019;Goff, 2019). Thus, the biofilm formations may cause biocorrosion and result in the loss of millions of dollars to the industries (Palmer et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Competitive and/or Cooperative Interactions of Listeria monocytogenes With Bacillus cereus in Dual-Species Biofilm Formation

2020

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Microorganisms in dairy industries can form monospecies, dual-species, or multispecies biofilms, showing cooperative or competitive behaviors, which might contribute to the reduction of efficiency of cleaning and sanitization processes and eventually turn into a potential source of contamination. This study proposes to evaluate the behavior of Listeria monocytogenes in monospecies biofilms, cocultured with Bacillus cereus. The isolates were of dairy origin, and the selection occurred after studies of competition among species. The biofilm formations on AISI 304 stainless steel at 25 • C in a stationary culture were analyzed to observe the cooperative or competitive interactions among species, as well as the effect of pre-adhered cells. Biofilm formation assays were performed in four experiments: Experiment 1: in the presence of strains of antagonistic substance producer B. cereus (+); Experiment 2: extract of the antagonistic substance of B. cereus; Experiment 3: pre-adhered cells of B. cereus; and Experiment 4: pre-adhered cells of L. monocytogenes. Subsequently, cooperative behavior was observed by scanning electron microscopy. The L. monocytogenes monospecies biofilm counts of greater than 5 log colony-forming units (CFU)/cm 2 were also observed in dual-species biofilms in the presence of B. cereus (non-producers of antagonist substance), showing cooperative behavior between species. However, in the presence of antagonistic substance produced by B. cereus, the counts were lower, 1.39 and 1.70 log CFU/cm 2 (p > 0.05), indicating that the antagonistic substance contributes to competitive interactions. These data are relevant for the development of new studies to control L. monocytogenes in the dairy industry.

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Section: Introductionmentioning

confidence: 99%

Competitive and/or Cooperative Interactions of Listeria monocytogenes With Bacillus cereus in Dual-Species Biofilm Formation

2020

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“…In the dairy, as for other environments, the physicochemical features of the material surface greatly determine the efficiency of bacterial attachment and BF formation. Several reports indicate that the charge and hydrophobicity of the surface constitute the major components that influence bacteria-surface interactions; moreover, the surface roughness or its topographic configuration may also contribute to bacterial attachment and BF formation (Palmer et al, 2015;Berne et al, 2018;Achinas et al, 2019).…”

Section: Some Physicochemical Factors That Affect Biofilms In Dairiesmentioning

confidence: 99%

Potential of N2 Gas Flushing to Hinder Dairy-Associated Biofilm Formation and Extension

Munsch-Alatossava¹,

Alatossava

2020

Front. Microbiol.

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Worldwide, the dairy sector remains of vital importance for food production despite severe environmental constraints. The production and handling conditions of milk, a rich medium, promote inevitably the entrance of microbial contaminants, with notable impact on the quality and safety of raw milk and dairy products. Moreover, the persistence of high concentrations of microorganisms (especially bacteria and bacterial spores) in biofilms (BFs) present on dairy equipment or environments constitutes an additional major source of milk contamination from pre-to post-processing stages: in dairies, BFs represent a major concern regarding the risks of disease outbreaks and are often associated with significant economic losses. One consumption trend toward "raw or low-processed foods" combined with current trends in food production systems, which tend to have more automation and longer processing runs with simultaneously more stringent microbiological requirements, necessitate the implementation of new and obligatory sustainable strategies to respond to new challenges regarding food safety. Here, in light of studies, performed mainly with raw milk, that considered dominant "planktonic" conditions, we reexamine the changes triggered by cold storage alone or combined with nitrogen gas (N 2) flushing on bacterial populations and discuss how the observed benefits of the treatment could also contribute to limiting BF formation in dairies.

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Significance of Bacterial Attachment

Cited by 2 publications

References 117 publications

Competitive and/or Cooperative Interactions of Listeria monocytogenes With Bacillus cereus in Dual-Species Biofilm Formation

Competitive and/or Cooperative Interactions of Listeria monocytogenes With Bacillus cereus in Dual-Species Biofilm Formation

Potential of N2 Gas Flushing to Hinder Dairy-Associated Biofilm Formation and Extension

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