Search results for "BIOFILM"
showing 10 items of 394 documents
Evaluation of the antibacterial power and biocompatibility of zinc oxide nanorods decorated graphene nanoplatelets: New perspectives for antibiodeter…
2017
Background Nanotechnologies are currently revolutionizing the world around us, improving the quality of our lives thanks to a multitude of applications in several areas including the environmental preservation, with the biodeterioration phenomenon representing one of the major concerns. Results In this study, an innovative nanomaterial consisting of graphene nanoplatelets decorated by zinc oxide nanorods (ZNGs) was tested for the ability to inhibit two different pathogens belonging to bacterial genera frequently associated with nosocomial infections as well as biodeterioration phenomenon: the Gram-positive Staphylococcus aureus and the Gram-negative Pseudomonas aeruginosa. A time- and dose-…
NEW 4-DIAZOPYRAZOLE DERIVATIVES AS POTENTIAL ANTIBIOFILM AGENTS
2010
Many infections such as otitis media, sinusitis, cholesteatoma, tonsillitis and adenoiditis are caused by biofilm forming mucosal pathogens (P. aeruginosa, S. aureus, S. peneomoniae, H. influenzae and M. catarrhalis). Moreover, the role of biofilms in the chronic otolaryngologic infections has been recognized for otitis media, tonsillitis and rhinosinusitis. Finally, bacterial biofilms of S. aureus, S. epidermis and E. faecalis are the leading cause of medical device-related infections. Pathogens growing as biofilms are intrinsically resistant to conventional antibiotics and therefore the discovery of new compounds able to act against biofilm aggregated micro organisms is an urgent task. Pr…
Estudio de la actividad del plasma frío a presión atmosférica sobre el biofilm y células planctónicas de Staphylococcus aureus, Pseudomonas aeruginos…
2020
El objeto de esta tesis es estudiar la actividad del plasma frío a presión atmosférica o ANTP (Atmospheric Non Thermal Plasma) sobre el biofilm y las células planctónicas de Staphylococcus aureus, Pseudomonas aeruginosa y Candida albicans. El plasma constituye el cuarto estado de agregación de la materia, tras los sólidos, líquidos y gases. Se produce al ionizar total o parcialmente un gas, pudiendo utilizar cualquier fuente de energía para su generación (eléctrica, térmica, óptica o radiación electromagnética ionizante). Al producirse cargas eléctricas libres (electrones e iones) el plasma es un buen conductor de la electricidad. El estado de plasma se alcanza cuando buena parte de las par…
Comparative Analysis of Machine Learning Methods to Predict Growth of F. sporotrichioides and Production of T-2 and HT-2 Toxins in Treatments with Et…
2021
The efficacy of ethylene-vinyl alcohol copolymer films (EVOH) incorporating the essential oil components cinnamaldehyde (CINHO), citral (CIT), isoeugenol (IEG), or linalool (LIN) to control growth rate (GR) and production of T-2 and HT-2 toxins by Fusarium sporotrichioides cultured on oat grains under different temperature (28, 20, and 15 °C) and water activity (aw) (0.99 and 0.96) regimes was assayed. GR in controls/treatments usually increased with increasing temperature, regardless of aw, but no significant differences concerning aw were found. Toxin production decreased with increasing temperature. The effectiveness of films to control fungal GR and toxin production was as follows: EVOH…
IN VITRO ANTI-STAPHYLOCOCCAL BIOFILM ACTIVITY OF SOME NATURAL PYRROLOMYCINS AND SYNTHETIC DERIVATIVES
2008
Biofilmas un metallo-β-laktamāzes producēšanas noteikšana Pseudomonas aeruginosa un Acinetobacter baumannii baktēriju almos
2020
Pseudomonas aeruginosa un Acinetobacter baumannii metallo-β-laktamāžu producēšana ir kļuvusi par pieaugošu terapeitisko problēmu visā pasaulē, kā arī antibiotiku rezistentiem celmiem ir spēja veidot noturīgākas biofilmas, kas rada problēmas šo patogēnu izraisīto infekciju ārstēšanā. Darba mērķis: noteikt Pseudomonas aeruginosa un Acinetobacter baumannii spēju veidot biofilmas, producēt metallo- β-laktamāzes, kā arī statistiski apkopot datus par jutību pret antibakteriālajiem līdzekļiem starp 2017. gadu un 2019. gadu, un veikt rezistences izmaiņas salīdzinājumu. Uzdevumi: identificēt no elpceļiem iegūtos izolātus ar BBL™ Crystal™ sistēmu, kā arī ar GenoType® BC gramnegative testu, veikt anti…
Innovative ready to use carrier-bacteria devices for bioremediation of oil contaminated water
2018
Bioremediation, that uses microorganisms to remove environmental pollutants, is the best way of restoring the environment due to its low cost and sustainability. Immobilization of microorganisms capable of degrading specific contaminants significantly promotes bioremediation processes. An innovative ready to use bioremediation system to clean up oil-contaminated water was developed immobilizing highly performant marine and soil HC degrading bacteria, on biodegradable oil-absorbing carriers. Two soil Actinobacteria (Gordonia sp. SoCg, Nocardia sp. SoB) and two marine Gammaproteobacteria (Alcanivorax sp. SK2, Oleibacter sp.5), were immobilized on biopolymeric membranes prepared by electrospin…
Efficacy of an amine fluoride-triclosan mouthrinse as compared to the individual active ingredients
2003
Background: The purpose of the clinical study was to examine the antibacterial and plaque-reducing properties of mouthrinses containing triclosan (TRI), amine fluoride (AmF), and the combination of both (AFT) on 4-day plaque regrowth. A placebo solution (PLA) and a 0.2% chlorhexidine solution (CHX) served as negative and positive controls, respectively. Materials & Methods: After a professional tooth cleaning (day 0), 15 volunteers refrained from all mechanical oral hygiene measures for the next 96 h and rinsed instead twice daily for 1 min with 10 ml of one of the five randomly assigned solutions. Plaque index (PlI), which was assessed after 24 and 96 h (PlI1, PlI2), and plaque area of the…
Endocarditis due to Abiotrophia defectiva, a biofilm-related infection associated with the presence of fixed braces
2017
Abstract Rationale: Endocarditis with Abiotrophia defectiva represents 4.3% to 6% of all streptococcal endocarditis. The article presents diagnosis issues and the complexity of the treatment. Patient concerns: We present the case of a female white patient, aged 26 years, who developed infectious endocarditis caused by A defectiva, in the last trimester of pregnancy, a biofilm-related infection associated with the presence of fixed braces. Diagnoses: The diagnosis of infectious endocarditis was confirmed by the cardiac ultrasound examination that revealed a voluminous vegetation on the mitral valve, and acute mitral regurgitation caused by chordae tendinae rupture, and also by isolating Abio…
Metagenomic investigation of bacteria associated with dental lesions : a cross-sectional study
2019
Background Dental caries is considered as one of the most significant global health problem over the world. Dental caries initiates from bacterial shifts within the supragingival biofilm, then a polymicrobial biofilm is formed on the surface of tooth, and finally various bacterial species aggregate in a complex-organized manner. The exploiting variability in 16S rRNA gene sequence has been considered as a cost-efficient high-throughput characterization approach in human oral microbiome investigations. The aim of this study is to characterize bacterial species associated with superficial dental biofilm, underlying carious dentine and root caries lesion by16S rRNA gene-based metagenomic analy…