نتایج جستجو برای: ژن hly a
تعداد نتایج: 13445306 فیلتر نتایج به سال:
زمینه و اهداف: سروگروپ ها و فاکتور های حدت اشریشیا کلی نقش مهمی را در بروز علائم عفونت ادراری کودکان بازی میکنند. هدف از بررسی حاضر تعیین همزمان فراوانی فاکتور های حدت، سروگروپ ها و خصوصیات مقاومت پادزیستی باکتری اشریشیا کلی یوروپاتوژنیک جداسازی شده از کودکان مبتلا به پیلونفریت و التهاب مثانه بود. مواد و روش کار: در این مطالعه که در طی سالهای 92-1391 انجام گرفت، 121 سویه اشریشیا کلی از نمونه...
BACKGROUND In order to define the virulence factors between Chinese herb-resistant uropathogenic E. coli and susceptible strains, the UPEC isolates were classified into two groups according to its resistance to Chinese herbs. MATERIALS AND METHODS The susceptibility profile of strains was determined by disk diffusion method. PCR systems were used to detect genes encoding papC, Aer, hly and cn...
A total of 71 Aeromonas strains were isolated in the south of Jiangsu Province China in order to analyze the difference ofAeromonas spp. distribution between diseased fish and water environment. The sequence of 16S rDNA and gyrB demonstrated that the 71 Aeromonas isolates could be divided into 4 species, including A. veronii (55), A. hydrophila (11), A. salmonicida (3) and A. media (2). A. vero...
UNLABELLED The only tuberculosis (TB) vaccine in use today, bacillus Calmette-Guérin (BCG), provides insufficient protection and can cause adverse events in immunocompromised individuals, such as BCGosis in HIV(+) newborns. We previously reported improved preclinical efficacy and safety of the recombinant vaccine candidate BCG ΔureC::hly, which secretes the pore-forming listeriolysin O of Liste...
Background and Aims: The purpose of this study was to investigate the possibility of Listeria monocytogenes entering the VBNC state during the frozen storage and the expression of its pathogenic genes Materials and Methods: Bacteria in 106 Colony counts of in mid log phase were inoculated into three Culture medium including Normal Saline (NS), BHI Broth and Fish Broth (FB) and kept at -18ºCfor...
It has been shown that fluorescence resonance energy transfer (FRET)-based PCR, including the TaqMan assay and molecular beacons, has potential for rapid detection of pathogens. In these promising real-time detection assays a single internal oligonucleotide probe labeled on both the 5' (reporter) and 3' (quencher) ends is used for selective generation of fluorescence. In this paper, we describe...
We studied 100 well-characterized E. coli blood isolates from patients with urosepsis for their susceptibility to nalidixic acid, ampicillin and trimethoprim-sulfamethoxazole, according to prevalence of virulence factors, phylogenetic groups and subgroups, PAI II(J96)-like domains (determined by physical linkage of cnf1, hly and hra) and PAI I(CFT073)-like domains (determined by physical linkag...
Aeromonas hydrophila is a mesophilic motile aeromonad present ubiquitously and causes high number of fish mortalities particularly in India along with various intestinal extraintestinal diseases humans. In this study, total 88 samples their processed products were screened by PCR targeting species-specific 16S rRNA gene, the virulent genes such as aerA, hly ahh1. The findings study showed that ...
زمینه و هدف: عفونت های دستگاه ادراری شایع ترین نوع عفونت بیمارستانی محسوب می شوند. اشریشیاکلی مهم ترین عامل ایجاد کننده عفونت های دستگاه ادراری در محیط های بیمارستانی و جامعه است. درمان عفونت های ناشی از این باکتری ها به علت فاکتورهای بیماری زایی متعدد و مقاومت های دارویی اغلب مشکل می باشد. فاکتورهای اتصالی، آنزیم ها و توکسین ها مهم ترین فاکتورهای بیماری زایی هستند که در جایگیری این ارگانیسم و ...
Background and Objectives: Currently, Escherichia coli is considered as one of the main causes of bacterial urinary tract infections. The aim of this study was evaluating the frequency of necrotizing factor type 1 (CNF1) and hemolysin (Hly) genes among E. coli strains isolated from hospitalized patients of Rouhani Hospital in Babol city. Materials and Methods: In this descriptive study, a ...
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