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PubMed Journals Articles About "Performance Of Nucleic Acid Amplification Tests For The Detection Of NG And CT" RSS

15:29 EST 19th January 2019 | BioPortfolio

Performance Of Nucleic Acid Amplification Tests For The Detection Of NG And CT PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Performance Of Nucleic Acid Amplification Tests For The Detection Of NG And CT articles that have been published worldwide.

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Showing "Performance Nucleic Acid Amplification Tests Detection" PubMed Articles 1–25 of 28,000+

Optimal timing for Trichomonas vaginalis test of cure using nucleic acid amplification testing.

The optimal timing for nucleic acid amplification testing (NAAT) post-treatment for Trichomonas vaginalis has not been fully established. Testing too soon post-treatment may detect remnant nucleic acid that is not from viable organisms, falsely misclassifying person as infected. The purpose of this study was to examine how long T. vaginalis nucleic acid is detectable post metronidazole (MTZ) treatment.


The predictive value of quantitative nucleic acid amplification detection of Clostridium difficile toxin gene for faecal sample toxin status and patient outcome.

Laboratory diagnosis of Clostridium difficile infection (CDI) remains unsettled, despite updated guidelines. We investigated the potential utility of quantitative data from a nucleic acid amplification test (NAAT) for C. difficile toxin gene (tg) for patient management.

Silica bead-based microfluidic device with integrated photodiodes for the rapid capture and detection of rolling circle amplification products in the femtomolar range.

The rapid and sensitive detection of specific nucleic acid sequences at the point-of-care (PoC) is becoming increasingly in demand for a variety of emergent biomedical applications ranging from infectious disease diagnostics to the screening of antimicrobial resistance. To meet such demand, considerable efforts have been invested towards the development of portable and integrated analytical devices combining microfluidics with miniaturized signal transducers. Here, we demonstrate the combination of rolling ...


Visualized Quantitation of Trace Nucleic Acids Based on Coffee-Ring Effect on Colloid-Crystal Substrate.

We report a visualized quantitative detection method for nucleic-acid amplification tests based on coffee-ring effect on a colloid-crystal substrate. The solution for loop-mediated isothermal amplification (LAMP) of DNA is dropcast on a colloid-crystal surface. After complete drying, a coffee ring containing the LAMP byproduct (i.e. magnesium pyrophosphate) is formed, and it is found that the width of the coffee ring is linearly correlated to the logarithm of the original DNA concentration before the isothe...

Evaluation of a rapid isothermal nucleic acid amplification kit, Alere™ i Influenza A&B, for the detection of avian influenza viruses.

Rapid and accurate diagnosis of influenza virus infection is essential for quick responses for both human and animal health. The Alere™ i Influenza A&B is a novel isothermal nucleic acid amplification kit that can detect and differentiate between influenza A and B viruses in human specimens in approximately 15 minutes. In the present study, the performance of the Alere™ i Influenza A&B kit was evaluated for its ability to detect avian influenza virus in chickens. The kit was able to detect representat...

Duplex lateral flow assay for the simultaneous detection of Yersinia pestis and Francisella tularensis.

High-risk pathogens such as Francisella tularensis and Yersinia pestis are categorised as highly hazardous organisms that can be used as biological weapons. Given the extreme infectivity of these potential biowarfare agents, a rapid, sensitive, cost-effective and specific method for their detection is required. Here, we report the multiplexed amplification detection of genomic DNA from Francisella tularensis and Yersinia pestis. Amplification was achieved using isothermal recombinase polymerase amplificatio...

Nanoscale Nucleic Acid Recognition at Solid-liquid Interface using Xeno Nucleic Acid Probes.

Challenges in reliable nucleic acid detection are manifold. The major ones are related to false positive or negative signals due to a lack of target specificity in detection, and to low sensitivity, especially when a plethora of background sequences are present that can mask the specific recognition signal. Utilizing designed synthetic nucleic acids that are commonly called xeno nucleic acids could offer potential routes to meet such challenges. In this article, we have presented the general framework of nu...

SD-chip enabled quantitative detection of HIV RNA using digital nucleic acid sequence-based amplification (dNASBA).

Quantitative detection of RNA is important in molecular biology and clinical diagnostics. Nucleic acid sequence-based amplification (NASBA), a single-step method to amplify single-stranded RNA, is attractive for use in point-of-care (POC) diagnostics because it is an isothermal technique that is as sensitive as RT-PCR with a shorter reaction time. However, NASBA is limited in its ability to provide accurate quantitative information, such as viral load or RNA copy number. Here we test a digital format of NAS...

A prospective study evaluating the impact of cartridge-based nucleic acid amplification test (CBNAAT) on the management of tuberculosis in a low-resource high-burden Indian rural setting.

The cartridge-based nucleic acid amplification test (CBNAAT) Xpert MTB/RIF is more sensitive than smear microscopy for the diagnosis of tuberculosis (TB). It is also more expensive, costing 1450 INR as compared to 10 INR per smear.

Detection of Norovirus by BD MAX™, Xpert Norovirus, and xTAG Gastrointestinal Pathogen Panel in stool and vomit samples.

Norovirus is a leading cause of infectious gastroenteritis, characterized by outbreaks of diarrhoea and vomiting in closed settings. Nucleic acid amplification tests allow rapid and sensitive laboratory diagnosis of norovirus, with a number of commercial platforms now available.

Rolling circle extension-actuated loop-mediated isothermal amplification (RCA-LAMP) for ultrasensitive detection of microRNAs.

Rolling circle amplification (RCA) is an elegant and well-recognized isothermal nucleic acid amplification mechanism that has been widely used for the detection of various kinds of genetic biomarkers. However, traditional RCA is a linear signal amplifying mechanism so that the amplification efficiency is generally not satisfactory. Herein, we rationally combine RCA with efficient loop-mediated isothermal amplification (LAMP) to establish a rapid and ultrasensitive RCA-LAMP method for the detection of microR...

Rapid and simple molecular tests for the detection of respiratory syncytial virus: a review.

Respiratory syncytial virus (RSV) is a leading cause of acute respiratory infections. The clinical manifestations of RSV are indistinguishable from other etiologies of acute respiratory infection. Therefore, accurate and timely laboratory testing is needed to impact clinical management. There are now multiple rapid, low-complexity, commercially available assays for RSV. These tests present significant performance advantages compared to older antigen detection tests. Accurate and rapid diagnosis of RSV has t...

Laboratory Impact of Rapid Molecular Tests used for the Detection of Respiratory Pathogens.

With outbreaks of new respiratory viruses such as the severe acute respiratory syndrome coronavirus and swine-origin influenza A/H1N1, the nucleic acid-based amplification test was introduced to identify causative agents. Multiplex PCR, which can simultaneously detect various respiratory pathogens, is currently used worldwide. Recently, a new type of multiplexed molecular test using a fully automated workflow system was developed, which was also adapted to our laboratory. In this study, we assessed improvem...

Single-Step Recombinase Polymerase Amplification Assay Based on a Paper Chip for Simultaneous Detection of Multiple Foodborne Pathogens.

A paper chip device-based recombinase polymerase amplification (RPA) method was developed for highly sensitive and selective single-step detection of foodborne pathogens. A paper chip was manufactured by simply stacking functional papers. RPA reagents and fluorescent probe were dried on the reaction zone of a patterned polyethersulfone membrane. The RPA reaction was initiated by adding pathogen DNAs into an injection hole. Paper chip-based analysis of pathogens showed optimal performance at 37°C for 20 min...

p24 revisited: A landscape review of antigen detection for early HIV diagnosis.

: Despite major advances in HIV testing, early detection of infection at the point of care (PoC) remains a key challenge. While rapid antibody PoC and laboratory-based nucleic acid amplification tests dominate the diagnostics market, the viral capsid protein p24 is recognized as an alternative early virological biomarker of infection. However, the detection of ultra-low levels of p24 at the PoC has proven challenging. Here we review the landscape of p24-diagnostics to identify knowledge gaps and barriers an...

Simple protocol for sequence-specific detection of mixed-base nucleic acids using a smart probe with NABs.

A fluorescent smart probe (SP) was used to detect a mixed-base ribonucleic acids sequence. While the SP presents excellent sensitivity for the target, it gives subtle discrimination between the perfect target sequence and several mismatch sequences. Its sequence-specificity for the target was greatly enhanced by using nucleic acid blockers (NABs), which are unlabeled, non-fluorescent hairpin oligonucleotides that are perfectly complementary to those mismatch sequences. This method is simple, feasible at roo...

Direct or DNA Extraction-Free Amplification and Quantification of Foodborne Pathogens.

The use of direct nucleic acid amplification of pathogens from food matrices has the potential to reduce time to results over DNA extraction-based approaches as well as traditional culture-based approaches. Here we describe protocols for assay design and experiments for direct amplification of foodborne pathogens in food sample matrices using loop-mediated isothermal amplification (LAMP) and polymerase chain reaction (PCR). The examples provided include the detection Escherichia coli in milk samples and Sal...

Automated TruTip nucleic acid extraction and purification from raw sputum.

Automated nucleic acid extraction from primary (raw) sputum continues to be a significant technical challenge for molecular diagnostics. In this work, we developed a prototype open-architecture, automated nucleic acid workstation that includes a mechanical homogenization and lysis function integrated with heating and TruTip purification; optimized an extraction protocol for raw sputum; and evaluated system performance on primary clinical specimens. Eight samples could be processed within 70 min. The system ...

Integration of sample preparation and analysis into an optofluidic chip for multi-target disease detection.

Detection of molecular biomarkers with high specificity and sensitivity from biological samples requires both sophisticated sample preparation and subsequent analysis. These tasks are often carried out on separate platforms which increases required sample volumes and the risk of errors, sample loss, and contamination. Here, we present an optofluidic platform which combines an optical detection section with single nucleic acid strand sensitivity, and a sample processing unit capable of on-chip, specific extr...

Nucleic acid based risk assessment and staging for clinical practice in multiple myeloma.

The recently introduced Revised International Staging System (R-ISS) for multiple myeloma (MM) integrates albumin, β2 microglobulin, lactate dehydrogenase (LDH) with high-risk cytogenetic aberrations (CA), i.e., t(4;14) and t(14;16) and del17p using fluorescent in situ hybridization (FISH). We evaluated utility of nucleic acid-based tests of multiplex ligation-based probe amplification (MLPA) and quantitative real-time polymerase chain reaction (qRT-PCR) to define the CA and the R-ISS categories as per thi...

Diagnostic Challenge of Tuberculosis Heterogeneity.

For the ICU physician, the failure to consider, diagnose, and treat tuberculosis (TB) results in increased morbidity and mortality, and poses risks to both patients and health care providers. At present, the diagnosis of TB depends on the detection of either mycobacteria or mycobacterial products from clinical specimens. Given the risks posed to both the patient and health care providers by undiagnosed and/or untreated TB, the ability to diagnose TB rapidly in the ICU cannot be understated. In this regard, ...

Magnetic beads assay based on zip nucleic acid for electrochemical detection of factor V Leiden mutation.

Single nucleotide polymorphisms (SNPs) are the most common type of genetic variation among people. Development of reliable methods for the detection of SNP is crucial in aspects of molecular diagnosis and personalized medicine. In our study, a genomagnetic assay in combination with zip nucleic acid (ZNA) for electrochemical detection of SNP related to Factor V Leiden (FV Leiden) mutation. For the first time in the literature, a new generation nucleic acid; ZNA was applied herein for electrochemical monitori...

On-site detection of bovine leukemia virus by a field-deployable automatic nucleic extraction plus insulated isothermal polymerase chain reaction system.

Bovine leukemia virus (BLV) is a contagious, oncogenic deltaretrovirus of cattle with a worldwide distribution. In the US, over 40% of dairy cows are infected with the virus, and evidence of its economic impact is growing. This study evaluated the performance of a field-deployable automatic nucleic acid-extraction/insulated isothermal PCR (iiPCR) system for on-site BLV-proviral DNA detection in dairy cows compared with a conventional laboratory real-time PCR (rt-PCR). Assay performance was verified in paral...

Rapid detection of multiple respiratory viruses based on microfluidic isothermal amplification and a real-time colorimetric method.

Respiratory viruses are major threats causing development of acute respiratory tract infections, which are common causes of illness and death throughout the world. Here, an integrated microsystem based on real-time colorimetry was developed for diagnosing multiple respiratory viruses. The microsystem employed magnetic beads for nucleic acid extraction and an eight-channel microfluidic array chip integrated with a loop-mediated isothermal amplification system for point-of-care screening of respiratory viruse...

Rapid, Safe, and Simple Manual Bedside Nucleic Acid Extraction for the Detection of Virus in Whole Blood Samples.

The rapid diagnosis of an infection is essential for the outbreak management, risk containment, and patient care. We have previously shown a method for the rapid bedside inactivation of the Ebola virus during blood sampling for safe nucleic acid (NA) tests by adding a commercial lysis/binding buffer directly into the vacuum blood collection tubes. Using this bedside inactivation approach, we have developed a safe, rapid, and simplified bedside NA extraction method for the subsequent detection of a virus in ...


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