Bacterial cell attachment, the beginning of a biofilm

Palmer, John W.; Flint, Steve; Brooks, J.

doi:10.1007/s10295-007-0234-4

Cited by 586 publications

(388 citation statements)

References 125 publications

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“…Thus the differences in ability to observe residue could be eased if a lamp with the right wavelength is used given the surface and residue. The ability to detect residue on cleaned surfaces is important since such soils are important in the adhesion and retention of microorganisms, which is also the starting point for the development of biofilms (Palmer et al 2007).…”

Section: Resultsmentioning

confidence: 99%

Assessment of interplay between UV wavelengths, material surfaces and food residues in open surface hygiene validation

Abban

Jespersen

2013

J Food Sci Technol

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The use of UV-visible radiation for detecting invisible residue on different surfaces as a means of validating cleanliness was investigated. Wavelengths at 365, 395, 435, 445, 470 and 490 nm from a monochromator were used to detect residues of beef, chicken, apple, mango and skim milk. These were on three surfaces: aluminium, fibre re-enforced plastic (FRP; Q-Liner®) and stainless steel, pre-and post a cleaning step using commercial detergent. The area covered by residues as detected by specific wavelengths was compared statistically. The sensitivity of the wavelengths for detection differed significantly (p<0.05) for various residues depending on the material surfaces. Generally, wavelengths 365-445 nm were consistently able to illuminate all residue before cleaning, though sensitivity varied, while 490 nm showed more of the surface structural features instead of residue. The 365-395 nm wavelengths were significantly more sensitive (p< 0.05) for detecting beef and chicken residues on aluminium and stainless steel both before and after cleaning. The 435-445 nm wavelengths were significantly more sensitive for detecting apple and mango residues on the FRP both before and after cleaning. It is important when UV-systems are used as real-time tools for assessing cleanliness of surfaces that the surface materials being illuminated are taken into account in the choice of lamp wavelength, in addition to expected residue. This will ensure higher confidence in results during the use of UV-light for real-time hygiene validation of surfaces.

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Section: Resultsmentioning

confidence: 99%

Assessment of interplay between UV wavelengths, material surfaces and food residues in open surface hygiene validation

Abban

Jespersen

2013

J Food Sci Technol

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“…The mechanisms governing bacteria interaction with treated and untreated glass surfaces are multifarious, and have been the subject of investigation for many researchers in the fields of bio-fouling and development of antimicrobial substrates. [72][73][74] In TR devices bacteria attachment depends on many factors including the interplay between a range of physico-chemical properties, such as surface chemistry and roughness, and also the strength of the acoustic force directing them towards the surface. Although an investigation of these mechanisms is currently underway in our laboratories, in the present study we explored the use of a range of surface treatments to minimise bacterial attachment on the glass reflector of TR device (data to be published at a later date).…”

Section: Minimisation Of Bacteria Attachment On the Reflector Surfacementioning

confidence: 99%

A thin-reflector microfluidic resonator for continuous-flow concentration of microorganisms: a new approach to water quality analysis using acoustofluidics

et al. 2014

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An acoustofluidic device has been developed for concentrating vegetative bacteria in a continuous-flow format. We show that it is possible to overcome the disruptive effects of acoustic streaming which typically dominate for small target particles, and demonstrate flow rates compatible with the testing of drinking water. The device consists of a thin-reflector multi-layered resonator, in which bacteria in suspension are levitated towards a glass surface under the action of acoustic radiation forces. In order to achieve robust device performance over long-term operation, functional tests have been carried out to (i) maintain device integrity over time and stabilise its resonance frequency, (ii) optimise the operational acoustic parameters, and (iii) minimise bacterial adhesion on the inner surfaces. Using the developed device, a significant increase in bacterial concentration has been achieved, up to a maximum of ~60-fold. The concentration performance of thin-reflector resonators was found to be superior to comparable half-wave resonators.

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“…Interaction of bacterial cells with various surfaces has been studied for many years, especially with respect to biofouling. For instance, coating materials which have the ability to decrease bacterial attachment to the surface have many applications in medical implants, food processing, agriculture and ship design [31][32][33]. Many reports describe that seeding different bacterial strains onto similar surfaces results in different amounts of adherence [33,34].…”

Section: Introductionmentioning

confidence: 99%

Tunable conjugated polymers for bacterial differentiation

Golabi

Turner

Jager

2016

Sensors and Actuators B: Chemical

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A novel rapid method for bacterial differentiation is explored based on the specific adhesion pattern of bacterial strains to tunable polymer surfaces. Different types of counter ions were used to electrochemically fabricate dissimilar polypyrrole (PPy) films with diverse physicochemical properties such as hydrophobicity, thickness and roughness. These were then modulated into three different oxidation states in each case. The dissimilar sets of conducting polymers were Principal Component Analysis showed that each strain of bacteria had its own specific adhesion pattern. Hence, they could be discriminated by this simple, label-free method. , based on tunable polymer arrays combined with pattern recognition.

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Bacterial cell attachment, the beginning of a biofilm

Cited by 586 publications

References 125 publications

Assessment of interplay between UV wavelengths, material surfaces and food residues in open surface hygiene validation

Assessment of interplay between UV wavelengths, material surfaces and food residues in open surface hygiene validation

A thin-reflector microfluidic resonator for continuous-flow concentration of microorganisms: a new approach to water quality analysis using acoustofluidics

Tunable conjugated polymers for bacterial differentiation

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