نتایج جستجو برای: urec

تعداد نتایج: 148  

2011
Xianhua Yin Jing Zhu Yanni Feng James R. Chambers Joshua Gong Carlton L. Gyles

BACKGROUND Escherichia coli O157:H7 strain 86-24 grown in MacConkey broth (MB) shows almost no adherence to cultured epithelial cells but adheres well in pig ligated intestines. This study investigated the mechanisms associated with the difference between in-vitro and in-vivo adherence of the MB culture. METHODOLOGY/PRINCIPAL FINDINGS It was found that decreased adherence in vitro by bacteria...

Journal: :Applied and environmental microbiology 2014
Jong Nam Kim Emily Decrescenzo Henriksen Isaac K O Cann Roderick I Mackie

The model rumen Firmicutes organism Ruminococcus albus 8 was grown using ammonia, urea, or peptides as the sole nitrogen source; growth was not observed with amino acids as the sole nitrogen source. Growth of R. albus 8 on ammonia and urea showed the same growth rate (0.08 h(-1)) and similar maximum cell densities (for ammonia, the optical density at 600 nm [OD600] was 1.01; and for urea, the O...

Journal: :Infection and immunity 1991
H L Mobley G R Chippendale K G Swihart R A Welch

Proteus mirabilis, a common agent of nosocomially acquired and catheter-associated bacteriuria, can cause acute pyelonephritis. In ascending infections, bacteria colonize the bladder and ascend the ureters to the proximal tubules of the kidney. We postulate that Proteus species uses the HpmA hemolysin and urease to elicit tissue damage that allows entry of these bacteria into the kidney. To stu...

باقری, نادر, رئیسی, سمیه, رحیمیان, قربانعلی, رشیدی, رضا, رفیعیان کوپایی, محمود, رمضانی, قاسم, شاهوردی, الهه, شاهی, حشمت, شفیق اردستانی, محمدهادی, شیرزاد, هدایت اله, صادقیانی, مرضیه, فتح الهی, فرشته, هاشم زاده چالشتری, مرتضی,

Background and purpose: The expression of growth factors, proteolytic enzymes, fibrogenic factors, and cytokines are altered in Helicobacter pylori (H. pylori) infected gastric mucosa. Matrix metalloproteinases (MMP) are a family of zinc-dependent homologous enzymes digesting most of the components of the extracellular matrix and basement membrane and are involved in remodeling and functioning o...

الوندی, امیرهوشنگ, جلیلیان, سمیه, عبیری, رامین,

Background and purpose: cagA, vacAs1 and babA2 in Helicobacter pylori are important virulence factors associated with gastrointestinal diseases. The prevalence of these genes and their association with gastrointestinal disease is different around the world. Materials and methods: In a cross-sectional study, 1500 patients with gastroduodenal disorders were enrolled. They attended Imam Khomeini ...

ژورنال: کومش 2010
باقرنژاد, مریم, دوستی, عباس, کارگر, محمد,

سابقه و هدف: عفونت H.pylori با گاستریت، زخم معده و دوازدهه مرتبط است. بنابراین شناسایی و درمان آن از اهمیت زیادی برخوردار است. هدف از این پژوهش تشخیص H.pylori با روش PCR و مقایسه آن با روش‌های کشت و تست اوره آز سریع در بیماران مراجعه‌کننده به بیمارستان هاجر شهرکرد می‌باشد. مواد و روش‌ها: این پژوهش یک بررسی مقطعی توصیفی است که بر روی 263 بیمار مراجعه‌کننده به بیمارستان هاجر شهرکرد در تابستان 13...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1391

هلیکوباکتر پیلوری عامل اولیه ی گاستریت، زخم معده، زخم دئودنوم و سرطان معده می باشد. روش های مختلفی برای تشخیص عفونت helicobacter pylori وجود دارد که به دو دسته مهاجم و غیر مهاجم تقسیم می شوند. روش های غیر مهاجم شامل جستجوی آنتی بادی های سرمی، آنتی ژن مدفوعی، pcr مدفوعی و تست تنفسی اوره آز می باشند. هر یک از این تست ها دارای مزایا و معایبی هستند؛ اما روش هایی که دارای اختصاصیت بالا هستند به ویژه...

Journal: :gastroenterology and hepatology from bed to bench 0
negar souod meysam sarshar hossein dabiri hassan momtaz mohammad kargar alireza mohammadzadeh

aim: the purpose of this investigation was to determine the oipa and dupa genes of helicobacter pylori isolates from west of iran; chaharmahalo bakhtiyari region and find their relationship with the severity of the gastroduodenal diseases. background: helicobacter pylori is an organism responsible for many gastroduodenal diseases. studies suggest that genetic diversity in h . pylori virulence f...

2013
Mohammad Khalifehgholi Fereshteh Shamsipour Hossein Ajhdarkosh Naser Ebrahimi Daryani Mohammad Reza Pourmand Mostafa Hosseini Amir Ghasemi Mohammad Hasan Shirazi

BACKGROUND AND OBJECTIVES Invasive and non-invasive techniques are used to diagnose H. pylori infection. Some factors influence the choice of a diagnostic test, such as the sensitivity and specificity of the tests, the clinical circumstances and the cost-effectiveness of the testing strategy. The aim of this study was to reveal the relationship between different H. pylori infection diagnosis me...

Journal: :Acta biochimica Polonica 2015
Maria Walencka Weronika Gonciarz Eliza Mnich Adrian Gajewski Pawel Stawerski Alina Knapik-Dabrowicz Magdalena Chmiela

Helicobacter pylori is an etiological agent of chronic gastritis, gastric and duodenal ulcers and gastric cancers. The use of an appropriate animal model for experimental studies on the pathogenesis of H. pylori infections is necessary due to the chronic character of such infections and difficulties in identifying their early stage in humans. The aim of this study was to develop a guinea pig mo...

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