نتایج جستجو برای: tst gene
تعداد نتایج: 1143257 فیلتر نتایج به سال:
accessory gene regulator (agr locus) is a global regulator of many virulence gene expressions instaphylococcus aureus. four interference classes related to genetic polymorphisms in the agr locus have sofar been described. in the present study, the agr locus specificity groups were studied within a total of 43 s.aureus isolates which were isolated from ewes with mastitis in three regions in the ...
Accessory gene regulator (agr locus) is a global regulator of many virulence gene expressions inStaphylococcus aureus. Four interference classes related to genetic polymorphisms in the agr locus have sofar been described. In the present study, the agr locus specificity groups were studied within a total of 43 S.aureus isolates which were isolated from ewes with mastitis in three regions in the ...
Tst-1/SCIP/Oct-6, a POU domain transcription factor, is transiently expressed by developing Schwann cells and is required for their normal development into a myelinating phenotype. In tst-1/scip/oct-6-null sciatic nerves, Schwann cells are transiently arrested at the "promyelinating" stage, when they have a one-to-one relationship with an axon but before they have elaborated a myelin sheath. To...
Background and Aim: Staphylococcus aureus produces many virulence factors, including toxins, immune-modulatory factors, and exoenzymes. The study was performed to determine virulence and resistance-related factors etA, etB, tst, mecA and femA in the S. aureus isolated from clinical samples using Multiplex PCR. Materials and Methods: In this cross - sectional study, a total 60 S. aureus were co...
Some clinical isolates of Staphylococcus aureus produce the superantigenic toxic shock syndrome toxin 1 (TSST-1), encoded by tst, located on pathogenicity islands. The expression of tst is complex and is influenced by environmental conditions such as pH, CO(2), and glucose. We identified a putative catabolite-responsive element (cre) in the promoter regions of all known tst genes, indicating th...
INTRODUCTION Staphylococcus aureus produces a range of virulence factors such as toxic shock syndrome toxin-1. METHODS In this cross-sectional study of 345 clinical S. aureus isolates, the presence of the tst gene was assessed by polymerase chain reaction (PCR). RESULTS The study revealed 53/345 (15.4%) isolates were positive for the tst gene. The tst gene was present in 18.1% of methicilli...
Background: Staphylococcus aureus is a major foodborne pathogen throughout the world. Enterotoxins and toxic shock syndrome toxin-1 are important virulence factors and as pyrogenic toxin superantigens have profound effects on the ir host. Thus circulation of TSST1 producing S.aureus among people and food chain is a worrying issue. The present paper was conducted to study Prevalence of tst, entC...
Expression of the POU domain protein Tst-1/Oct6 during development of glia and neurons is subject to a tight multifactorial control. Here we show that 17beta-estradiol increases the level of endogenous Tst-1/Oct6 in glial cells. This effect was mediated at the level of gene expression by an enhancer present in the 5' flanking region of the mouse gene for Tst-1/Oct6, approximately 5 kb upstream ...
Abstract Background: Staphylococcus aureus is one of the most common infectious bacterial pathogens. TSST-1 and enterotoxins are the major virulence factors of this organism which are superantigens and cause the toxic shock syndrome. The toxin-encoding genes are located on pathogenicity islands with the ability to move to non-toxigenic strains. This study was done to determine the frequency of ...
One commonly used, yet little understood method for transferring DNA into cells is the temperature shock transformation method (TST) that exposes competent bacteria to successive temperatures (4C and 42C). This study tested the effect of the gene for the heatstable nucleoid structuring protein (H-NS) on the efficiency of the TST method in an effort to find a way to improve the transformation ef...
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