نتایج جستجو برای: sxt constin
تعداد نتایج: 413 فیلتر نتایج به سال:
Vibrio fluvialis is a halophilic bacterium found in many environments and is mainly associated with sporadic cases and outbreaks of gastroenteritis in humans. Here, we describe the genome sequences of environmental strains of V. fluvialis 560 (Vf560) and V. fluvialis 539 (Vf539) possessing a variant of the integrative and conjugative element (ICE) SXT for the first time in Brazil and South Amer...
The recent determination of the genetic basis for the biosynthesis of the neurotoxin, saxitoxin, produced by cyanobacteria, has revealed a highly complex sequence of reactions, involving over 30 biosynthetic steps encoded by up to 26 genes clustered at one genomic locus, sxt. Insights into evolutionary-ecological processes have been found through the study of such secondary metabolites because ...
For women with recurrent urinary tract infections (rUTI), the contribution of antibiotic use versus patient-related factors in determining the presence of antimicrobial resistance in faecal and urinary Escherichia coli, obtained from the same patient population, has not been assessed yet. Within the context of the 'Non-antibiotic prophylaxis for recurrent urinary tract infections' (NAPRUTI) stu...
In Silico Analysis of Putative Paralytic Shellfish Poisoning Toxins Export Proteins in Cyanobacteria
Paralytic shellfish poisoning toxins (PSTs) are a family of more than 30 natural alkaloids synthesized by dinoflagellates and cyanobacteria whose toxicity in animals is mediated by voltage-gated Na(+) channel blocking. The export of PST analogues may be through SxtF and SxtM, two putative MATE (multidrug and toxic compound extrusion) family transporters encoded in PSTs biosynthetic gene cluster...
BACKGROUND Multi-drug-resistant, extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae, constitute an emerging public-health concern. Little data on the molecular epidemiology of ESBL producing Escherichia coli is available in Germany. Here we describe the prevalence and molecular epidemiology of ESBL producing-Escherichia coli isolates at a German University hospital. METHODS ...
Forty samples each of pork and chicken meat were collected from local retail markets in Khon Kaen, northeast Thailand, for Salmonella isolation and identification during 2003. Fifty-four isolates of Salmonella obtained from diarrheal patients admitted at a hospital located in the same town were serotyped. All isolates were also tested for antimicrobial sensitivity against amoxicillin (Amx), chl...
We consider evolutionary models for the population of short-period (Porb ∼ < 10 hr) low-mass black-hole binaries (LMBHB) and compare them with observations of soft X-ray transients (SXT). Evolution of LMBHB is determined by nuclear evolution of the donors and/or orbital angular momentum loss due to magnetic braking by the stellar wind of the donors and gravitational wave radiation. We show that...
The toxigenic freshwater cyanobacterium Cylindrospermopsis raciborskii T3 has been used as a model to study and elucidate the biosynthetic pathway of tetrahydropurine neurotoxins associated with paralytic shellfish poisoning (PSP). There are nevertheless several inconsistencies and contradictions in the toxin profile of this strain as published by different research groups, and claimed to inclu...
We report the cross-correlation function studies of a Neutron star low mass X-ray binary, Z source GX 5-1 using SXT and LAXPC energy bands onboard AstroSat. For first time, we lag between soft (0.8-2.0 keV, SXT) hard (10-20 keV 16-40 LAXPC) in detected lags order few tens to hundreds seconds Horizontal branch. interpreted them as readjustment time scale inner region accretion disc. used various...
At the beginning of 2020, about 9 million inhabitants Metropolitan Region Rio de Janeiro, dependent on Guandu Basin, experienced a water-supply crisis when their water tasted badly and gave off an odor. This work presents results analyses sanitary quality raw in this system at two different times during crisis, with respect to presence cyanobacteria found using metagenomic studies, cyanotoxins,...
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