75 documents found, page 1 of 8
Bacterial coaggregation’s role in water disinfection resistance
Afonso, Ana C.; Gomes, Inês B.; J. Saavedra, Maria; Simões, Lúcia C.; Simões, ManuelBackground: In the realm of water treatment and public health, the interplay between microorganisms and disinfection processes represents a constant and dynamic challenge [1]. As society strives to ensure the availability of safe and clean water, understanding the factors contributing to bacterial resistance to water disinfection emerges as a critical area of research [1]. Among these factors, the phenomen...
Adhesion of filamentous fungi isolated from drinking water under different proc...
Fernandes, Susana; Simões, Lúcia C.; Lima, Nelson; Simões, ManuelFilamentous fungi (ff) are consistently recognized as drinking water (DW) inhabitants, typically harboured in biofilms. Their sessile behaviour is still poorly understood. This study aimed the evaluation of the influence of several abiotic factors (substratum, hydrodynamic conditions and nutrient availability) on biofilm formation by Penicillium brevicompactum and P. expansum isolated from DW. Fungal adhesion w...
In vitro assessment of inter-kingdom biofilm formation by bacteria and filament...
Afonso, T. B.; Simões, Lúcia C.; Lima, NelsonThe main focus so far in the study of biofilm formation in drinking water has been bacteria. Studies on biofilm formation involving filamentous fungi are, therefore, scarce. This study aimed to assess and characterize the ability of these microorganisms to interact with bacteria whilst forming inter-kingdom biofilms. Biofilms were analysed in terms of total biomass, metabolic activity, bacterial colony forming ...
The effects of pharmaceutical and personal care products on the behavior of Bur...
Gomes, I. B.; Madureira, D.; Simões, Lúcia C.; Simões, M.The presence of pharmaceutical and personal care products (PPCPs) in water environments has been extensively reported, particularly at trace concentrations in drinking water (DW). Nevertheless, there is a lack of information on the possible effects of the presence of PPCPs on the microbiota of drinking water distribution systems (DWDS). This pioneer study aims to understand the effects of exposure to selected P...
The role of surface copper content on biofilm formation by drinking water bacteria
Gomes, I. B.; Simões, Lúcia C.; Simões, M.Copper pipes are conventionally used to supply tap water. Their role in biofilm prevention remains to be understood. This study evaluates the ability of selected surface materials with different copper contents (0, 57, 79, 87, 96, 100% of copper) to control biofilm formation and regrowth. Further experiments were performed to assess copper leaching and corrosion under conditions mimicking real plumbing systems....
Prolonged exposure of Stenotrophomonas maltophilia biofilms to trace levels of ...
Gomes, I. B.; Querido, M. M.; Teixeira, J. P.; Pereira, C. C.; Simões, Lúcia C.; Simões, M.The presence of pharmaceuticals in water sources, including in drinking water (DW), is increasingly being recognized as an emerging and global concern for the environment and public health. Based on the principles of the One Health initiative, the present work aims to understand the effects of clofibric acid (CA), a lipid regulator, on the behavior of a selected bacterium isolated from drinking water (DW). Biof...
The action of chemical and mechanical stresses on single and dual species biofi...
Gomes, I. B.; Lemos, M.; Mathieu, L.; Simões, M.; Simões, Lúcia C.The presence of biofilms in drinking water distribution systems (DWDS) is a global public health concern as they can harbor pathogenic microorganisms. Sodium hypochlorite (NaOCl) is the most commonly used disinfectant for microbial growth control in DWDS. However, its effect on biofilm removal is still unclear. This work aims to evaluate the effects of the combination of chemical (NaOCl) and mechanical stresses...
The effects of emerging environmental contaminants on Stenotrophomonas maltophi...
Gomes, Inês B.; Simões, Lúcia C.; Simões, ManuelConcerns on the presence of emerging contaminants (ECs) in water sources have increased in recent years. The lack of efficient technologies to remove ECs from residual waters contributes for their appearance in drinking water distribution systems (DWDS). Therefore, sessile microorganisms on DWDS pipes are continuously exposed to trace concentrations of ECs. However, no data exists on the role of ECs on the resi...
Inter-kingdom biofilm formation between bacteria and filamentous fungi isolated...
Afonso, Tiago; Simões, Lúcia C.; Lima, NelsonBackground The main challenge to the drinking water (DW) industry is to deliver a product that is microbiologically and chemically safe, aesthetically pleasing and adequate in quantity and delivery pressure. Biofilms constitute one of the major microbial problems in DW distribution systems (DWDS) that most contribute to the deterioration of water quality. Knowledge on DW biofilms has been mainly obtained from s...
The role of filamentous Fungi in the inter-kingdom complex association of water...
Simões, Lúcia C.; Afonso, Tiago; Paterson, R. R. M.; Lima, Nelson[Excerpt] The provision of safe drinking water (DW) is a top priority issue in any civilized society. Biofilms in drinking water distribution systems (DWDS) are responsible for several undesirable effects in the water quality. One the main drawbacks is their potential to protect pathogenic microorganisms from stress conditions. In such microcosms, microbial diversity leads to a variety of complex relationships ...