نتایج جستجو برای: nasba
تعداد نتایج: 236 فیلتر نتایج به سال:
The dynamics of active human cytomegalovirus (HCMV) infection was monitored by competitive nucleic acid sequence-based amplification (NASBA) assays for quantification of IE1 (UL123) and pp67 (UL65) mRNA expression levels in the blood of patients after lung transplantation. RNA was isolated from 339 samples of 13 lung transplant recipients and analyzed by the quantitative IE1 and pp67 NASBA in p...
چکید ه سابقه و هدف با شروع عفونت HIV-1 ، اولین مارکری که در خون آشکار می‌شود، RNA ویروسی می‌باشد. از میان روشهای موجود که شناسایی RNA را هدف قرار می‌دهند؛ متداول‌ترین روشها NASBA و RT-PCR هستند. NASBA مزیت‌های متعددی نسبت به RT-PCR ارایه می‌کند. در این پژوهش، واکنش NASBA در ترکیب با روش آشکارسازی آسان و حساس الایزا، برای تشخیص و آشکارسازی HIV-1 RNA مورد استفاده قرار گرفت. مواد و روش‌ه...
Nucleic acid sequence-based amplification (NASBA) has proved to be an ultrasensitive method for HIV-1 diagnosis in plasma even in the primary HIV infection stage. This technique was combined with fluorescence correlation spectroscopy (FCS) which enables online detection of the HIV-1 RNA molecules amplified by NASBA. A fluorescently labeled DNA probe at nanomolar concentration was introduced int...
Nucleic acid sequence-based amplification (NASBA) is a sensitive isothermal transcription-based amplification method known to be a suitable tool for RNA research. We demonstrate that NASBA technology can be applied to single nucleotide polymorphism (SNP) analysis using human genomic DNA as a template. Combination of DNA NASBA with multiplex hybridization of specific molecular beacons makes it p...
enteroviruses are the causative agents of a number of diseases in humans. group b coxsackieviruses are believed to be the most common viral agents responsible for human heart disease. genomic data of enteroviruses has allowed developing new molecular approaches such as nucleic acid sequence based amplification (nasba) for detection of such viruses. in this study, coxsackievirus b3 (cvb3) was de...
Molecular tools, such as real-time nucleic acid sequence-based amplification (NASBA) and PCR, have been developed to detect Trypanosoma brucei parasites in blood for the diagnosis of human African trypanosomiasis (HAT). Despite good sensitivity, these techniques are not implemented in HAT control programs due to the high cost of the equipment, which is unaffordable for laboratories in developin...
BACKGROUND The Leishmania OligoC-TesT and NASBA-Oligochromatography (OC) were recently developed for simplified and standardised molecular detection of Leishmania parasites in clinical specimens. We here present the phase II evaluation of both tests for diagnosis of visceral leishmaniasis (VL), cutaneous leishmaniasis (CL) and post kala-azar dermal leishmaniasis (PKDL) in Sudan. METHODOLOGY T...
چکیده طی دو دهه اخیر روشهای تشخیص hiv نقش مهمی را در حفظ سلامت در جهان ایفا کرده اند. روشهای مولکولی با حساسیت بالا نیز که اخیرا توسعه یافته اند قادرند عفونت را در مراحل بسیار ابتدایی نیز تشخیص دهند ؛ اما بسیاری از این تکنولوژی ها در کشور های در حال توسعه به دلایل اقتصادی قابل اجرا نیستند ؛ ولی چنانچه از هزینه های مربوط به این روشها کاسته شود استفاده از انها میسر می شود . با شروع عفونت hiv-...
DNA products generated from a region of the measles virus genome by three RNA reverse transcription and amplification methods were cloned and sequenced, and the results were compared in order to evaluate the methods' relative fidelities. The methods were: (i) reverse transcription followed by a nested polymerase chain reaction (RT-nPCR), (ii) a combined RT-PCR using rTth polymerase and (iii) nu...
A nucleic acid sequence-based amplification (NASBA) technique for the detection of hepatitis A virus (HAV) in foods was developed and compared to the traditional reverse transcription (RT)-PCR technique. Oligonucleotide primers targeting the VP1 and VP2 genes encoding the major HAV capsid proteins were used for the amplification of viral RNA in an isothermal process resulting in the accumulatio...
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