Quartz tuning fork studies on the surface properties of Pseudomonas aeruginosa during early stages of biofilm formation

2013 ◽  
Vol 102 ◽  
pp. 117-123 ◽  
Author(s):  
Jorge Otero ◽  
Rosa Baños ◽  
Laura González ◽  
Eduard Torrents ◽  
Antonio Juárez ◽  
...  
2015 ◽  
Vol 127 ◽  
pp. 182-191 ◽  
Author(s):  
Rohit Ruhal ◽  
Henrik Antti ◽  
Olena Rzhepishevska ◽  
Nicolas Boulanger ◽  
David R. Barbero ◽  
...  

2012 ◽  
Vol 170 ◽  
pp. 7-12 ◽  
Author(s):  
K. Waszczuk ◽  
G. Gula ◽  
M. Swiatkowski ◽  
J. Olszewski ◽  
W. Herwich ◽  
...  

2017 ◽  
Vol 79 (6) ◽  
pp. 71-81 ◽  
Author(s):  
O.I. Balko ◽  
◽  
O.B. Balko ◽  
L.V. Yaroshenko ◽  
M.A. Skorik ◽  
...  

Author(s):  
Baydaa Hussein ◽  
Zainab A. Aldhaher ◽  
Shahrazad Najem Abdu-Allah ◽  
Adel Hamdan

Background: Biofilm is a bacterial way of life prevalent in the world of microbes; in addition to that it is a source of alarm in the field of health concern. Pseudomonas aeruginosa is a pathogenic bacterium responsible for all opportunistic infections such as chronic and severe. Aim of this study: This paper aims to provide an overview of the promotion of isolates to produce a biofilm in vitro under special circumstances, to expose certain antibiotics to produce phenotypic evaluation of biofilm bacteria. Methods and Materials: Three diverse ways were used to inhibited biofilm formation of P.aeruginosa by effect of phenolic compounds extracts from strawberries. Isolates produced biofilm on agar MacConkey under certain circumstances. Results: The results showed that all isolates were resistant to antibiotics except sensitive to azithromycin (AZM, 15μg), and in this study was conducted on three ways to detect the biofilm produced, has been detected by the biofilm like Tissue culture plate (TCP), Tube method (TM), Congo Red Agar (CRA). These methods gave a clear result of these isolates under study. Active compounds were analyzed in both extracts by Gas Chromatography-mass Spectrometry which indicate High molecular weight compound with a long hydrocarbon chain. Conclusion: Phenolic compounds could behave as bioactive material and can be useful to be used in pharmaceutical synthesis. Phenolic contents which found in leaves and fruits extracts of strawberries shows antibacterial activity against all strains tested by the ability to reduce the production of biofilm formation rate.


2016 ◽  
Vol 6 (01) ◽  
pp. 5218
Author(s):  
Laxmi Mohandas ◽  
Anju T. R. ◽  
Sarita G. Bhat*

An assortment of redox-active phenazine compounds like pyocyanin with their characteristic blue-green colour are synthesized by Pseudomonas aeruginosa, Gram-negative opportunistic pathogens, which are also considered one of the most commercially valuable microorganisms. In this study, pyocyanin from Pseudomonas aeruginosa BTRY1 from food sample was assessed for its antibiofilm activity by micro titer plate assay against strong biofilm producers belonging to the genera Bacillus, Staphylococcus, Brevibacterium and Micrococcus. Pyocyanin inhibited biofilm activity in very minute concentrations. This was also confirmed by Scanning Electron Microscopy (SEM) and Confocal Laser Scanning Microscopy (CLSM). Both SEM and CLSM helped to visualize the biocontrol of biofilm formation by eight pathogens. The imaging and quantification by CLSM also established the impact of pyocyanin on biofilm-biocontrol mainly in the food industry.


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