نتایج جستجو برای: subinhibitory concentrations

تعداد نتایج: 306940  

Journal: :Scientific Electronic Archives 2022

Numerous studies have shown that subinhibitory concentrations of antimicrobials can alter bacterial virulence factors. This study evaluates motility and biofilm formation by H. pylori 43504 grown in amoxicillin (AMX), clarithromycin (CLA), or tetracycline (TET). For the swimming swarming assays, suspensions were prepared with strain alone AMX, CLA, TET at ½ MIC. Next, media incubated 37 ºC, und...

2011
Laura Pedró Rosa C. Baños Sonia Aznar Cristina Madrid Carlos Balsalobre Antonio Juárez

The nucleoid-associated proteins Hha and YdgT repress the expression of the toxin α-hemolysin. An Escherichia coli mutant lacking these proteins overexpresses the toxin α-hemolysin encoded in the multicopy recombinant plasmid pANN202-312R. Unexpectedly, we could observe that this mutant generated clones that no further produced hemolysin (Hly(-)). Generation of Hly(-) clones was dependent upon ...

Journal: :Applied and environmental microbiology 2005
Nuno Cerca Silvia Martins Sanna Sillankorva Kimberly K Jefferson Gerald B Pier Rosario Oliveira Joana Azeredo

Low concentrations of antibiotics can inhibit microbial adherence to medical device surfaces. However, little is known about the changes that occur in the physiology of bacteria within biofilms formed in the presence of subinhibitory (sub-MIC) concentrations of antibiotics. In this study, the densities and matrix compositions of biofilms formed by two coagulase-negative Staphylococcus species i...

2011
Marie Marchal Romain Briandet David Halter Sandrine Koechler Michael S. DuBow Marie-Claire Lett Philippe N. Bertin

Biofilms represent the most common microbial lifestyle, allowing the survival of microbial populations exposed to harsh environmental conditions. Here, we show that the biofilm development of a bacterial species belonging to the Thiomonas genus, frequently found in arsenic polluted sites and playing a key role in arsenic natural remediation, is markedly modified when exposed to subinhibitory do...

Journal: :Indian journal of medical microbiology 2005
K C Vidya P S Mallya P S Rao

BACKGROUND Urinary Tract Infections (UTIs) due to Escherichia coli is one of the most common diseases encountered in clinical practice. Most common recognised pathogenic factor in E.coli is adhesion. There is accumulating evidence that through subinhibitory concentrations (sub-MICs) of many antibiotics do not kill bacteria, they are able to interfere with some important aspects of bacterial cel...

2011
Jiazhang Qiu Xiaoran Zhang Mingjing Luo Hongen Li Jing Dong Jianfeng Wang Bingfeng Leng Xiaoliang Wang Haihua Feng Wenzhi Ren Xuming Deng

BACKGROUND The pathogenicity of staphylococcus aureus is dependent largely upon its ability to secrete a number of virulence factors, therefore, anti-virulence strategy to combat S. aureus-mediated infections is now gaining great interest. It is widely recognized that some plant essential oils could affect the production of staphylococcal exotoxins when used at subinhibitory concentrations. Per...

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