نتایج جستجو برای: adhesin and biofilm genes
تعداد نتایج: 16872415 فیلتر نتایج به سال:
The streptococcal collagen-like proteins 1 and 2 (Scl1 and Scl2) are major surface adhesins that are ubiquitous among group A Streptococcus (GAS). Invasive M3-type strains, however, have evolved two unique conserved features in the scl1 locus: (i) an IS1548 element insertion in the scl1 promoter region and (ii) a nonsense mutation within the scl1 coding sequence. The scl1 transcript is drastica...
The Candida albicans Als adhesin Als5p has an amyloid-forming sequence that is required for aggregation and formation of model biofilms on polystyrene. Because amyloid formation can be triggered by force, we investigated whether laminar flow could activate amyloid formation and increase binding to surfaces. Shearing Saccharomyces cerevisiae cells expressing Als5p or C. albicans at 0.8 dyne/cm(2...
Background and Aim: The most important factor in the formation of Staphylococcus aureus is the ability to form biofilms. This bacterium has the ability to bind and penetrate into tissue cells. Biofilmic infections are usually chronic and reversible and respond to difficult treatment. The purpose of this study was to identify biofilm genes in Staphylococcus aureus isolated from clinical and food...
Background and Aim: Staphylococci are common pathogens of humans and livestock that able to produce a wide range of diseases. Staphylococcus epidermidis and Staphylococcus aureus are the important factors for biofilm production in patients. This study was designed to determine the ability of biofilm production and the resistance pattern of Staphylococcus epidermidis and Staphylococcus aur...
Dental biofilm formation is critical for maintaining the healthy microbial ecology of the oral cavity. Streptococci are predominant bacterial species in the oral cavity and play important roles in the initiation of plaque formation. In this study, we identified a new cell surface protein, BapA1, from Streptococcus parasanguinis FW213 and determined that BapA1 is critical for biofilm formation. ...
Bacterial biofilm is considered as a particular lifestyle helping cells to survive hostile environments triggered by a variety of signals sensed and integrated through adequate regulatory pathways. Pseudomonas aeruginosa, a Gram-negative bacterium causing severe infections in humans, forms biofilms and is a fantastic example for fine-tuning of the transition between planktonic and community lif...
Non-typhoidal Salmonella (NTS) remains a global pathogen that affects a wide range of animal species. We analyzed a large number of NTS isolates of different host origins, including Salmonella Heidelberg (n = 80, avian), S. Dublin (50, bovine), S. Typhimurium var 5- (n = 40, porcine), S. 4,5,12,:i:- (n = 40, porcine), S. Cerro (n = 16, bovine), and S. Montevideo (n = 14, bovine), using virulenc...
Background & Objectives: Staphylococcus aureus is one of the most common nosocomial pathogens with high mortality rates. The Biofilm-dependent methicillin-resistant S. aureus remains a major clinical concern in this group of patients. The aim of this study was to investigate the icaABCD forming biofilm genes in methicillin resistant isolates of S. aureus. Materials and Methods: In study was per...
Biofilms on silicone rubber voice prostheses are the major cause for frequent failure and replacement of these devices. The presence of both bacterial and yeast strains has been suggested to be crucial for the development of voice prosthetic biofilms. Polymicrobial biofilms that include Candida albicans and Rothia dentocariosa are the leading cause of voice prosthesis failure. An in vitro biofi...
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