The role of cell-surface interactions in bacterial initial adhesion and consequent biofilm formation on nanofiltration/reverse osmosis membranes

Habimana, Olivier; Semiao, Andrea; Casey, Eoin

doi:10.1016/j.memsci.2013.11.043

Cited by 233 publications

(123 citation statements)

References 145 publications

(185 reference statements)

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“…Additionally, the contact of bacterial cells with such surfaces as soil particles can modify the electrokinetic properties of their envelopes (Bushby 1990). On the other hand, EPS could decrease the adherence of bacteria to hydrophilic surfaces by increasing their hydrophobicity (Habimana et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Production of exopolysaccharide by Rhizobium leguminosarum bv. trifolii and its role in bacterial attachment and surface properties

et al. 2014

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Background and aims The acidic exopolysaccharide (EPS) produced by Rhizobium leguminosarum bv. trifolii is required for the establishment of effective symbiosis with compatible host plants (Trifolium spp.). In the rhizobium-legume interaction, early stages of root infection and nodule development have been well studied from a genetic standpoint. However, factors important for colonization of several surfaces by rhizobia, including soil particles and roots, have not yet been thoroughly investigated. The aim of this study was establishing of environmental factors affecting production of EPS by R. leguminosarum bv. trifolii strain 24.2 and the role of this polysaccharide in bacterial surface properties and attachment ability. Methods Besides the wild-type strain, its derivatives differing in the level of EPS produced were used to these analyses. The ability of attachment to abiotic and biotic surfaces of these strains were established using CFU counting experiments. Three-dimensional structure and other parameters of biofilms formed were characterized in confocal laser scanning microscopy. Electrokinetic (zeta) potential of rhizobial cells were determined using Laser Doppler Velocimetry. Results It was evidenced that the ability of R. leguminosarum bv. trifolii to produce EPS significantly affected bacterial attachment and biofilm formation on both abiotic and biotic surfaces. In addition, the presence of this polysaccharide influenced the zeta potential of rhizobial cells. Mutant strains having a mutation in genes involved in EPS synthesis were significantly impaired in attachment, whereas strains overproducing this polysaccharide showed higher adhesion efficiency to all of the tested materials. EPS facilitated attachment of bacterial cells to the tested surfaces most probably due to hydrophobic interactions and heterogeneity of the envelope surface. Conclusions EPS produced by R. leguminosarum bv. trifolii plays a significant role in attachment and biofilm formation to both abiotic and biotic surfaces as well as bacterial surface properties.

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Section: Discussionmentioning

confidence: 99%

Production of exopolysaccharide by Rhizobium leguminosarum bv. trifolii and its role in bacterial attachment and surface properties

et al. 2014

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“…Surface proteins and extracellular organs such as pili, fimbria, flagella and curli help bacteria to attach to the surfaces [36]. Different ratios and biochemical composition of these cell wall appendages cause variation in adhesion properties between different bacterial species and even different strains of the same species [37].…”

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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“…The observed rejection in % for a given solute was calculated from the equation: (1) where C P and C f are the solute concentration in the permeate and the feed, respectively.…”

Section: Calculationsmentioning

confidence: 99%

“…The degree of severity is different from case to case. For example, biofouling (biofilm formation), one of the main operating problems, has been discussed in numerous studies [1][2][3]. The difficulties are not only to be considered from a practical point of view.…”

Section: Introductionmentioning

confidence: 99%

Fractionation of a galacto-oligosaccharides solution at low and high temperature using nanofiltration

Pruksasri

Nguyễn

Haltrich

et al. 2015

Separation and Purification Technology

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Like in many applications, solutions of high sugar content can cause serious problems due to microorganism contaminations. Hence, the main aim of this work was to study a nanofiltration process for GOS purification at 5 °C and 60 °C that may circumvent or reduce potential microbial growth. Process performances and rejection behaviors of monosaccharide as well as individual GOS components were compared. Operating at 5 °C is more advantageous especially with respect to the oligosaccharide (OS) recovery yield. Using a NF membrane (NP030) at 45 bar, a product purity of 85% (based on monosaccharide content) and an OS recovery yield of 82% could be achieved. However, a low average permeate flux of 3 L/m 2 h had to be accepted. A diafiltration step improved product purity to 90% with 30% losses of OS. A qualitative theoretical discussion shows that a possible change of the pore radius distribution depending on temperature could play a role in solute rejection as well as selectivity.

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The role of cell-surface interactions in bacterial initial adhesion and consequent biofilm formation on nanofiltration/reverse osmosis membranes

Cited by 233 publications

References 145 publications

Production of exopolysaccharide by Rhizobium leguminosarum bv. trifolii and its role in bacterial attachment and surface properties

Production of exopolysaccharide by Rhizobium leguminosarum bv. trifolii and its role in bacterial attachment and surface properties

Tunable conjugated polymers for bacterial differentiation

Fractionation of a galacto-oligosaccharides solution at low and high temperature using nanofiltration

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