E. coli adhesion to silica in the presence of humic acid

Parent, Mary; Velegol, Darrell

doi:10.1016/j.colsurfb.2004.08.020

Cited by 41 publications

(26 citation statements)

References 43 publications

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“…For example, in the presence of humic acid (HA), bacterial attachment to sand decreased due to competition for attachment sites between the bacteria and HA and due to the HA changing the properties of the sand [101]. In contrast, the presence of HA had a small effect on adhesion of E. coli to silica or glass surfaces [102]. Besides competition for adhesion sites, an adsorptive layer may provide a metabolically favourable environment for bacterial cells, due for example to enhanced nutrient availability at that surface [103].…”

Section: Conditioning Layersmentioning

confidence: 99%

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

Habimana

Semiao

Casey

2014

Journal of Membrane Science

230

113

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Section: Conditioning Layersmentioning

confidence: 99%

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

Habimana

Semiao

Casey

2014

Journal of Membrane Science

230

113

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“…The stabilisation of the intestinal microflora and the maintenance of optimum pH in the gut of animals have been reported as results of HS treatment (Islam et al 2005). The in vitro study of Parent and Velegol (2004) showed that HS could alter the adhesion of E. coli. However, in vitro studies are often not sufficient to explain bacterial adhesion events in vivo due to a lack of numerous biological interactions (e.g.…”

Section: Faecal Total E Coli and Etec Sheddingmentioning

confidence: 99%

Prophylaxis of post-weaning diarrhoea in piglets by zinc oxide and sodium humate

Trčková¹,

Lorencova²,

Hazova³

et al. 2015

Vet. Med. - Czech

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ABSTRACT:The high prophylactic doses of ZnO commonly used to control post-weaning diarrhoea (PWD) in piglets have become an environmental problem. The possibility of partial replacement of ZnO by sodium humate (HNa) in PWD treatment was investigated in this study. Weaned piglets (32) were challenged with two enterotoxigenic E. coli strains (ETEC/O149/F4/LT and ETEC/O147/F18/LT) and allocated into four treatments maintained for three weeks: C (no supplementation); ZnO2.5 (2.5 g ZnO/kg diet); HNa + ZnO1.0; HNa + ZnO1.5; HNa + ZnO1.7 (20 g HNa and 1.0, 1.5 and 1.7 g ZnO/kg diet, respectively). The effects on incidence, severity and duration of diarrhoea, faecal shedding of total E. coli and both ETEC strains, growth rate and selected blood parameters were investigated. In contrast with ZnO2.5 and HNa + ZnO1.7, high daily diarrhoea scores, incidence and duration and mortality due to severe dehydration were seen in C, HNa + ZnO1.0 and HNa + ZnO1.5 groups. The administration of ZnO and HNa did not affect the faecal shedding of the challenged ETEC strains for eght days, even in clinically healthy piglets in ZnO2.5 and HNa + ZnO1.7 groups. Signs of growth depression were found in C; HNa + ZnO1.0 and HNa + ZnO1.5 groups during the first week. No difference in growth performance was observed in ZnO2.5 and HNa + ZnO1.7 piglets. Most of the selected biochemical and haematological parameters did not differ significantly among the treatments. However, a significantly higher serum Zn as a result of high dietary ZnO intake in the ZnO2.5 group compared to the control and HNa groups was detected. Significantly lower serum P in ZnO2.5; HNa + ZnO1.7 and HNa + ZnO1.0 groups compared to the control group was most likely induced by the increased Zn in serum. The results indicate the possibility of reducing the high pharmacological levels of ZnO in the prophylaxis of PWD through partial replacement with HNa. Such a treatment maintains the favourable prophylactic effect while lowering the Zn content in faeces.Keywords: humic; enterotoxigenic E. coli; faecal shedding; growth performance; blood chemistry List of abbreviations: ALP = alkaline phosphatase, ALT = alanine transaminase, ANOVA = analyses of variance, AST = aspartate aminotransferase, BWG = body weight gains, CFU = colony forming units, DDS = daily diarrhoea score, ETEC = enterotoxigenic Escherichia coli, FCR = feed conversion ratio, FI = feed intake, HNa = sodium humate, HS = humic substances, PWD = post-weaning diarrhoea

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“…Until recently, studies of cell adhesion have been focused mainly on cellular response to surface chemistry (11)(12)(13) and topography (14,15) and on microbial adherence to stiff supports, such as polystyrene, Teflon, and glass (9,(16)(17)(18). In biological systems, cells often come into contact with soft surfaces, e.g., tissue or an extracellular matrix, which can undergo changes in elasticity (e.g., wound healing).…”

mentioning

confidence: 99%

Detachment of affinity-captured bioparticles by elastic deformation of a macroporous hydrogel

Dainiak

Kumar

Galaev

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

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Adsorption of bioparticles to affinity surfaces involves polyvalent interactions, complicating greatly the recovery of the adsorbed material. A unique system for the efficient binding and release of different cells and particles is described. Affinity-bound bioparticles and synthetic particles are detached from the macroporous hydrogel matrix, a so-called cryogel, when the cryogel undergoes elastic deformation. The particle detachment upon elastic deformation is believed to be due to breaking of many of the multipoint attachments between the particles and the affinity matrix and the change in the distance between affinity ligands when the matrix is deformed. However, no release of affinity-bound protein occurred upon elastic deformation. The phenomenon of particle detachment upon elastic deformation is believed to be of a generic nature, because it was demonstrated for a variety of bioparticles of different sizes and for synthetic particles, for different ligandreceptor pairs (IgG-protein A, sugar-ConA, metal ion-chelating ligand), and when the deformation was caused by either external forces (mechanical deformation) or internal forces (the shrinkage of thermosensitive, macroporous hydrogel upon an increase in temperature). The elasticity of cryogel monoliths ensures high recovery of captured cells under mild conditions, with highly retained viability. This property, along with their continuous porous structure makes cryogel monoliths very attractive for applications in affinity cell separation. affinity cryogel monoliths ͉ polyvalent interactions ͉ cell separation ͉ thermosensitive hydrogels ͉ cell release

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E. coli adhesion to silica in the presence of humic acid

Cited by 41 publications

References 43 publications

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

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

Prophylaxis of post-weaning diarrhoea in piglets by zinc oxide and sodium humate

Detachment of affinity-captured bioparticles by elastic deformation of a macroporous hydrogel

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