نتایج جستجو برای: gene frequency
تعداد نتایج: 1580534 فیلتر نتایج به سال:
Introduction & Objective: TEM-1 beta lactamase gene is one of the important plasmidic genes in Enterobacteriaceae which is the cause of over 90% of Escherichia coli isolates resistance to beta lactam antibiotics. In this study, the frequency of TEM-1 gene in nosocomial strains of Escherichia coli, Klebsiella pneumoniae and Enterobacter was investigated using PCR. Materials & Methods: In th...
background: in this study we aimed at detecting the enterotoxin a and b gene of s. aureus in clinical samples of patients attending health centers in zahedan using molecular methods. materials and methods: a cross-sectional study was carried out in which 40 samples of s. aureus were obtained from patients in a hospital in zahedan, iran. following the biochemical tests, identifications were conf...
Introduction: There are various virulence factors encoded by Staphylococcus Aureus, which enable them to cause nosocomial infections and mastitis in dairy cattle. The clf-A gene mediates the bacterial colonization through binding to the extracellular matrix of the host. Treatment of such infections becomes more difficult due to increased resistance to methicillin. The current study aimed at inv...
Abstract Background: NOD2 gene located on chromosome 16 (IBD1) is known to have a strong association with Crohn’s disease. Three common polymorphisms of this gene including R702W, G908R, 1007fsinsC, were reported to be frequent in many western populations while rare occurrence of them was observed in eastern countries. The aim of this study was to assess the frequency of these polymorphisms ...
Background and Aims: Helicobacter pylori (H. pylori) is a gram-negative, microaerophilic, spiral-shaped flagellated bacterium that is urease, catalase and oxidase positive. One of its pathogenicity factors is the iceA gene. H. pylori has recently been recognized as a genetic indicator for the development and evolution of duodenal ulcer disease in the East. This study aimed to determine the pres...
Background and Aim: Pseudomonas aeruginosa is one of the most important factors in hospital infections, especially in patients with immune deficiency and Childhood diseases. The Virulence of bacteria are due to the presence of the Pyoverdine gene, which has many effects on the wild type of bacteria during the pathogenic pathway. Identification of different classes of PVD gene is necessary for t...
Background and aims: Gastric malignancies have the fourth place among the most prevalent cancers. In many cancers, overexpressing of HER2/neu gene has been observed with a poor prediction. Up to now, there is a little information about the duplication of HER2/neu gene in gastric cancer using MLPA method. The present study aimed to investigate the frequency of mutations resulting from ampl...
duchene and becker muscular dystrophy (dmd and bmd) are x-linked conditions that result from a defect in the dystrophin gene located on xp21. dmd is the most frequent neuromuscular disease in humans (1/3500 male newborns). in approximately 65% of dmd and bmd patients, deletions in the dystrophin gene have been identified as the molecular determinant. population-based variations in frequency and...
spinal muscular atrophy (sma) is a common autosomal recessive neuromuscular disorder caused by the loss of α-motor neurons in the spinal cord. the survival motor neuron (smn) protein is encoded by 2 genes, smn1 and smn2. the most frequent mutation is the biallelic deletion of exon 7 of the smn1 gene. smn2 cannot compensate for the loss of smn1, due to the exclusion of exon 7. carrier frequency ...
Background and Aim: Colorectal cancer is one of the most common malignancies in worldwide. Because the gene 5, 10-methylene-tetrahydrofolate reductase (MTHFR) plays a key role in methylation, synthesis and repair of DNA, numerous studies have focused on evaluating the correlation between polymorphisms of this gene and sporadic colorectal cancer. This study was carried out to examine the associa...
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