Interplay of physico-chemical and mechanical bacteria-surface interactions with transport processes controls early biofilm growth: A review

Santore, Maria M.

doi:10.1016/j.cis.2022.102665

Cited by 22 publications

(5 citation statements)

References 238 publications

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“… 55 Moreover, the binding kinetics of different pathogens to the surfaces of the leaves (adherence) may also contribute the daynamics of pathogens on the leaves surface. 56 , 57 …”

Section: Resultsmentioning

confidence: 99%

“…55 Moreover, the binding kinetics of different pathogens to the surfaces of the leaves (adherence) may also contribute the daynamics of pathogens on the leaves surface. 56,57 The contamination of vegetables grown in soil irrigated with fecal-contaminated water will largely depend on the survival capabilities of the pathogens in the wastewater, soil, and vegetables. 58,59 Several reviews highlighted the effect of microbial quality of irrigation water on the pathogenic populations on vegetable products have been published.…”

Section: The Effect Of Ecoli Load In Wastewater and Soil On The Quali...mentioning

confidence: 99%

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Fecal Contamination in the Wastewater Irrigation System and its Health Threat to Wastewater-Based Farming Households in Addis Ababa, Ethiopia

Ali

Gari

Goodson

et al. 2023

Environ�Health�Insights

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Due to rapidly growing demand, the production of vegetables is increasing along the Akaki Rivers. The objective of this study was to examine the degree of fecal contamination and levels of fecal contamination and dissemination throughout the wastewater irrigation system. Irrigation water, irrigated soil, and leafy vegetables were collected twice during 2 vegetable growing seasons, at the maturity period of the growing season, from 19 sampling points along the 2 Akaki Rivers. Composite samples were taken from all sampling points and E.coli was enumerated. The mean E.coli load in wastewater and non-wastewater sources were 1.16±5.53 CFU/100 ml and 2.232±1.292 CFU/100 ml respectively. All counts of E. coli in the wastewater exceeded the WHO’s standards indicating that the irrigation water quality was unacceptable. In the wastewater-irrigated and non-wastewater-irrigated soil, the mean E.coli were 3.62 ±1.582 CFU/g and 1.322±87.1 CFU/g respectively. Meanwhile, the mean E.coli counts on the lettuce and Swiss chard were 78 ± 2 CFU/g and 44 ±3CFU/g respectively. The E.coli count on the leafy vegetables was found to be associated with the E.coli in the wastewater and soil. The production of leafy vegetables using wastewater with unacceptably high levels of E.coli and high occupational exposure introduces high levels of risk to the farming communities and to the consumers. Leafy, low-growing raw edible vegetables need careful treatment during food production and harvesting procedures or activities.

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“… 55 Moreover, the binding kinetics of different pathogens to the surfaces of the leaves (adherence) may also contribute the daynamics of pathogens on the leaves surface. 56 , 57 …”

Section: Resultsmentioning

confidence: 99%

Section: The Effect Of Ecoli Load In Wastewater and Soil On The Quali...mentioning

confidence: 99%

Fecal Contamination in the Wastewater Irrigation System and its Health Threat to Wastewater-Based Farming Households in Addis Ababa, Ethiopia

Ali

Gari

Goodson

et al. 2023

Environ�Health�Insights

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“…When in the late exponential or stationary phase, the flocculation of the culture caused by EPS production is evident. It was hypothesized a culture that has started to produce EPS, which is both secreted to the medium and retained in the cellular membrane for cell protection ( Korcz and Varga, 2021 ), might be adsorbed to the pretreated wood ( Santore, 2022 ), and thereby showing negative effects on D-LA metabolism. The interaction between biofilms and wood might change not only because of the increase in the number of cells that do not attach to the biofilms after a certain density but also might be related to changes in the physiological state of the cells, which might lead to cell disaggregation from the biofilm and subsequent improvement of mass transfer and metabolism ( Santore, 2022 ).…”

Section: Discussionmentioning

confidence: 99%

“…It was hypothesized a culture that has started to produce EPS, which is both secreted to the medium and retained in the cellular membrane for cell protection ( Korcz and Varga, 2021 ), might be adsorbed to the pretreated wood ( Santore, 2022 ), and thereby showing negative effects on D-LA metabolism. The interaction between biofilms and wood might change not only because of the increase in the number of cells that do not attach to the biofilms after a certain density but also might be related to changes in the physiological state of the cells, which might lead to cell disaggregation from the biofilm and subsequent improvement of mass transfer and metabolism ( Santore, 2022 ). Since EPS production is not observed in an early growth stage, a study was conducted where the culture was initiated in a synthetic medium supplemented with glucose until it reached an early exponential phase, when pretreated solids were added to the bioreactor, with and without enzyme addition ( Figure 2 ).…”

Section: Discussionmentioning

confidence: 99%

Overcoming extended lag phase on optically pure lactic acid production from pretreated softwood solids

Campos,

Almqvist,

Bao

et al. 2023

Front. Bioeng. Biotechnol.

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Optically pure lactic acid (LA) is needed in PLA (poly-lactic acid) production to build a crystalline structure with a higher melting point of the biopolymer than that of the racemic mixture. Lignocellulosic biomass can be used as raw material for LA production, in a non-food biorefinery concept. In the present study, genetically engineered P. acidilactici ZP26 was cultivated in a simultaneous saccharification and fermentation (SSF) process using steam pretreated softwood solids as a carbon source to produce optically pure D-LA. Given the low concentrations of identifiable inhibitory compounds from sugar and lignin degradation, the fermentation rate was expected to follow the rate of enzymatic hydrolysis. However, added pretreated solids (7% on weight (w/w) of water-insoluble solids [WIS]) significantly and immediately affected the process performance, which resulted in a long lag phase (more than 40 h) before the onset of the exponential phase of the fermentation. This unexpected delay was also observed without the addition of enzymes in the SSF and in a model fermentation with glucose and pretreated solids without added enzymes. Experiments showed that it was possible to overcome the extended lag phase in the presence of pretreated softwood solids by allowing the microorganism to initiate its exponential phase in synthetic medium, and subsequently adding the softwood solids and enzymatic blend to proceed to an SSF with D-LA production.

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“…In this work, instead, we want to treat a different kind of trapping, and by this term we mean that the particle can undergo a sudden irreversible stopping of its motion when it passes through a certain region (irreversible immobilization or irreversible trapping in a slow dynamic phase). This is, for example, the case of bacterial adhesion to surfaces, occurring in the early stage of biofilms formation [30][31][32][33]. Biofilms are complex aggregates of microorganisms that often form on surfaces and are held together by an extracellular polymeric matrix.…”

Section: Introductionmentioning

confidence: 99%

Run-and-tumble motion in trapping environments

Angelani

2023

Phys. Scr.

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Complex or hostile environments can sometimes inhibit the movement capabilities of diffusive particles or active swimmers, who may thus become stuck in fixed positions. This occurs, for example, in the adhesion of bacteria to surfaces at the initial stage of biofilm formation. Here we analyze the dynamics of active particles in the presence of trapping regions, where irreversible particle immobilization occurs at a fixed rate. By solving the kinetic equations for run-and-tumble motion in one space dimension, we give expressions for probability distribution functions, focusing on stationary distributions of blocked particles, and mean trapping times in terms of physical and geometrical parameters. Different extensions of the trapping region are considered, from infinite to cases of semi-infinite and finite intervals. The mean trapping time turns out to be simply the inverse of the trapping rate for infinitely extended trapping zones, while it has a nontrivial form in the semi-infinite case and is undefined for finite domains, due to the appearance of long tails in the trapping time distribution. Finally, to account for the subdiffusive behavior observed in the adhesion processes of bacteria to surfaces, we extend the model to include anomalous diffusive motion in the trapping region, reporting the exact expression of the mean-square displacement.

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Interplay of physico-chemical and mechanical bacteria-surface interactions with transport processes controls early biofilm growth: A review

Cited by 22 publications

References 238 publications

Fecal Contamination in the Wastewater Irrigation System and its Health Threat to Wastewater-Based Farming Households in Addis Ababa, Ethiopia

Fecal Contamination in the Wastewater Irrigation System and its Health Threat to Wastewater-Based Farming Households in Addis Ababa, Ethiopia

Overcoming extended lag phase on optically pure lactic acid production from pretreated softwood solids

Run-and-tumble motion in trapping environments

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