نتایج جستجو برای: ژن های agr

تعداد نتایج: 483034  

2000
Karin Tegmark Wisell

The pathogenic bacterium Staphylococcus aureus has the ability to cause a wide variety of human diseases, ranging from superficial abscesses and wound infections to deep and systemic infections such as osteomyelitis, endocarditis and septicaemia. The ability to cause disease has been attributed to a large number of toxins and digesting enzymes as well as to proteins at the bacterial surface tha...

Journal: :Journal of bacteriology 2009
Zhijie Yang Jaehyoung Kim Chaomei Zhang Min Zhang Joeseph Nietfeldt Carolyn M Southward Michael G Surette Stephen D Kachman Andrew K Benson

The LEE pathogenicity island has been acquired on multiple occasions within the different lineages of enteropathogenic and enterohemorrhagic Escherichia coli. In each lineage, LEE expression is regulated by complex networks of pathways, including core pathways shared by all lineages and lineage-specific pathways. Within the O157:H7 lineage of enterohemorrhagic E. coli, strain-to-strain variatio...

Journal: :Infection and immunity 2005
Dorte Frees Karen Sørensen Hanne Ingmer

Staphylococcus aureus causes infections ranging from superficial wound infections to life-threatening systemic infections. Essential for S. aureus pathogenicity are a number of cell-wall-associated and secreted proteins that are controlled by a complex regulatory network involving the quorum-sensing agr locus and a large set of transcription factors belonging to the Sar family. Recently, we rev...

Journal: :The Analyst 2016
Lili Xiao Jiao Yin Yingchun Li Qunhui Yuan Hangjia Shen Guangzhi Hu Wei Gan

Nitrogen (N) and sulfur (S) co-doped activated graphene (N,S-AGR) was prepared by the one-pot pyrolysis of a mixture of graphene oxide (GO), thiourea, and potassium hydroxide (KOH), where thiourea acts as the source of N and S dopants and KOH is the activator for porosity. N,S-AGR with a dopant abundance of 2.8 at% N and 2.3 at% S was then used as a high-activity electrocatalyst in the fabricat...

Journal: :Infection and immunity 2006
Saara Qazi Barry Middleton Siti Hanna Muharram Alan Cockayne Philip Hill Paul O'Shea Siri Ram Chhabra Miguel Cámara Paul Williams

Many gram-negative bacteria employ N-acylhomoserine lactone (AHL)-mediated quorum sensing to control virulence. To determine whether gram-positive bacteria such as Staphylococcus aureus respond to AHLs, we used a growth-dependent lux reporter fusion. Exposure of S. aureus to different AHLs revealed that 3-oxo-substituted AHLs with C10 to C14 acyl chains inhibited light output and growth in a co...

Journal: :Journal of clinical microbiology 2009
Yoichi Sugiyama Kazuya Okii Yoshiaki Murakami Takashi Yokoyama Yoshio Takesue Hiroki Ohge Taijiro Sueda Eiso Hiyama

We studied the characteristics of methicillin (meticillin)-resistant Staphylococcus aureus (MRSA) strains that caused enteritis. In a previous report, we demonstrated that both phenotypic and genotypic changes were associated with MRSA enteritis; and we hypothesized that the accessory gene regulator (agr), which is a global regulator of staphylococcal virulence and upregulates several exoprotei...

Journal: :Turkish journal of clinics and laboratory 2022

Background: The albumin/globulin ratio (AGR) is one of several indicators inflammation and immunity. This has a prognostic significance in many malignant diseases. Previous studies have demonstrated relationship between inflammatory mediators post-operative pancreatic fistula (POPF). study aimed to evaluate the AGR, relatively new indicator, with (POPF).
 Methods: Pancreaticoduodenectomy (...

Journal: :Proceedings 2021

Staphylococcus aureus is a Gram-positive opportunistic pathogen that imposes heavy burden on society. What sets this apart the sheer spectrum of infections it can cause, which range from benign skin and soft tissue to lethal endocarditis bacteraemia. The ability S. cause gamut conferred by its arsenal virulence factors are under control Accessory Gene Regulator (Agr) system. However, large prop...

Journal: :Journal of Entomological Society of Iran 2023

مگس مینوز سبزی و صیفی Liriomyza sativae Blanchard ، از مهم­ترین آفات ‌های گلخانه ای فضای باز، محسوب می شود. با توجه به توصیه کاربرد حشره­ کش تیوسیکلام جهت مدیریت آفت مزبور، در پژوهش حاضر، اثرات کشندگی زیرکشندگی(5/131:LC30، 1/87:LC20، 15/49:LC10 میلی گرم ماده موثره بر لیتر) حشره ­کش (اویسکت®SP50%) روی فراسنجه ­های زیستی این شرایط آزمایشگاهی مورد ارزیابی قرار گرفت. روش استفاده انجام آزمایش­ها غوط...

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