keyword
MENU ▼
Read by QxMD icon Read
search

Multiplex PCR

keyword
https://www.readbyqxmd.com/read/29144958/isolation-of-blandm-producing-enterobacteriaceae-in-a-public-hospital-in-salvador-bahia-brazil
#1
Maria Goreth Barberino, Silvia de Araujo Cruvinel, Célio Faria, Marco Aurélio Salvino, Márcio Oliveira
Carbapenemases have great importance in the global epidemiological scenario since infections with carbapenemase-producing bacteria are associated with high mortality, especially in hospitalized patients in intensive care units. This study describes two microorganisms producers of the New Delhi Metallo-b-lactamase (NDM), Klebsiella pneumoniae and Citrobacter freundii, from two patients admitted to a public hospital in Salvador, Bahia. These are the first clinical cases of NDM described in microorganisms in the north and northeast Brazil...
November 13, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29142545/rapid-screening-of-pyogenic-staphylococcus-aureus-for-confirmation-of-genus-and-species-methicillin-resistance-and-virulence-factors-by-using-two-novel-multiplex-pcr
#2
Abdul Haque, Asma Haque, Muhammad Saeed, Aysha Azhar, Samreen Rasool, Sidra Shan, Beenish Ehsan, Zohaib Nisar
Objectives: Emergence of methicillin resistant Staphylococcus aureus (MRSA) is a major medical problem of current era. These bacteria are resistant to most drugs and rapid diagnosis can provide a clear guideline to clinicians. They possess specific virulence factors and relevant information can be very useful. We designed this study to develop multiplex PCRs to provide rapid information. Methods: We studied 60 Staphylococcus aureus isolates and detected methicillin resistance by cefoxitin sensitivity and targeting of mecA gene...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29141913/multiplexed-biomarker-panels-discriminate-zika-and-dengue-virus-infection-in-humans
#3
Guang Song, Hee-Sool Rho, Jianbo Pan, Pedro Ramos, Ki-Jun Yoon, Freddy A Medina, Emily M Lee, Daniel J Eichinger, Guo-Li Ming, Jorge L Muñoz-Jordan, Hengli Tang, Ignacio Pino, Hongjun Song, Jiang Qian, Heng Zhu
Zika virus (ZIKV) and dengue virus (DENV) are closely related flaviviruses that cause widespread, acute febrile illnesses, notably microcephaly for fetuses of infected pregnant women. Detecting the viral cause of these illnesses is paramount to determine risks to patients, counsel pregnant women, and help fight outbreaks. A combined diagnostic algorithm for ZIKV and DENV requires Reverse transcription polymerase chain reaction (RT-PCR) and IgM antibody detection. RT-PCR differentiates between DENV and ZIKV infections during the acute phases of infection, but differentiation based on IgM antibodies is currently nearly impossible in endemic areas...
November 15, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29141131/simultaneous-detection-of-four-foodborne-viruses-in-food-samples-using-a-one-step-multiplex-reverse-transcription-pcr
#4
Shin-Young Lee, Mi-Ju Kim, Hyun-Joong Kim, KwangCheol Casey Jeong, Hae-Yeong Kim
A one-step multiplex reverse transcription PCR (RT-PCR) method comprising six primer sets (for the detection of norovirus GI and GII, hepatitis A virus, rotavirus, and astrovirus) was developed to simultaneously detect four kinds of pathogenic viruses. The size of the PCR products for norovirus GI and GII, hepatitis A virus (VP3/VP1 and P2A regions), rotavirus, and astrovirus were 330, 164, 244, 198, 629, and 449 bp, respectively. The RT-PCR with the six primer sets showed specificity for the pathogenic viruses...
November 15, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29139529/lab-on-capillary-a-rapid-simple-and-quantitative-genetic-analysis-platform-integrating-nucleic-acid-extraction-amplification-and-detection
#5
Yu Fu, Xiaoming Zhou, Da Xing
In this work, we describe for the first time a genetic diagnosis platform employing a polydiallyldimethylammonium chloride (PDDA)-modified capillary and a liquid-based thermalization system for rapid, simple and quantitative DNA analysis with minimal user interaction. Positively charged PDDA is modified on the inner surface of the silicon dioxide capillary by using an electrostatic self-assembly approach that allows the negatively charged DNA to be separated from the lysate in less than 20 seconds. The capillary loaded with the PCR mix is incorporated in the thermalization system, which can achieve on-site real-time PCR...
November 15, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/29138500/circulating-androgen-receptor-combined-with-18f-fluorocholine-pet-ct-metabolic-activity-and-outcome-to-androgen-receptor-signalling-directed-therapies-in-castration-resistant-prostate-cancer
#6
V Conteduca, E Scarpi, P Caroli, S Salvi, C Lolli, S L Burgio, C Menna, G Schepisi, S Testoni, G Gurioli, G Paganelli, V Casadio, F Matteucci, U De Giorgi
The association between choline uptake and androgen receptor (AR) expression is suggested by the upregulation of choline kinase-alpha in prostate cancer. Recently, detection of AR aberration in cell-free DNA as well as early 18F-fluorocholine positron emission tomography/computed tomography (FCH-PET/CT) were associated with outcome in metastatic castration-resistant prostate cancer (mCRPC) patients treated with abiraterone and enzalutamide. We aimed to make a direct comparison between circulating AR copy number (CN) and choline uptake at FCH-PET/CT...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29136326/dna-based-testing-in-lung-transplant-recipients-with-suspected-non-viral-lower-respiratory-tract-infection-a-prospective-observational-study
#7
Nora Drick, Benjamin Seeliger, Mark Greer, Benjamin A Bollmann, Stefan Ziesing, Tobias Welte, Jens Gottlieb
BACKGROUND: Non-viral lower respiratory tract infections (LRTI) are common among lung transplant (LTx) recipients with increased mortality. Early pathogen identification is crucial to guide therapy and avoid adverse events. Results from cultures may require up to 72 hours. Multiplex polymerase chain reaction assay (PCR) may allow faster pathogen identification, but its utility in LTx recipients with suspected non-viral LRTI remains unclear. METHODS: In a prospective open-label observational trial, LTx recipients presenting with suspected LRTI received bronchoscopy with bronchoalveolar lavage (BAL)...
November 14, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29134203/use-of-multiplex-quantitative-pcr-to-evaluate-the-impact-of-pneumococcal-conjugate-vaccine-on-nasopharyngeal-pneumococcal-colonization-in-african-children
#8
Courtney P Olwagen, Peter V Adrian, Marta C Nunes, Michelle J Groome, Mark F Cotton, Avy Violari, Shabir A Madhi
Pneumococcal conjugate vaccine (PCV) immunization of children induces shifts in colonizing pneumococcal serotypes. This study evaluated the effect of infant vaccination with 7-valent PCV (PCV7) on vaccine serotype (VT) colonization and whether the increase in nonvaccine serotype (NVT) was due to either unmasking of previously low-density-colonizing serotypes or increase in acquisition of NVT. A multiplex quantitative PCR (qPCR) was used to evaluate VT and NVT nasopharyngeal colonization in archived swabs of PCV-vaccinated and PCV-unvaccinated African children at 9 and 15 to 16 months of age...
November 2017: MSphere
https://www.readbyqxmd.com/read/29133595/targeted-next-gen-sequencing-for-detecting-mll-gene-fusions-in-leukemia
#9
Sadia Afrin, Christine Rc Zhang, Claus Meyer, Caedyn L Stinson, Thy Pham, Timothy Jc Bruxner, Nicola C Venn, Toby N Trahair, Rosemary Sutton, Rolf Marschalek, J Lynn Fink, Andrew S Moore
Mixed Lineage Leukemia (MLL) gene rearrangements characterize approximately 70% of infant and 10% of adult and therapy-related leukemia. Conventional clinical diagnostics, including cytogenetics and fluorescence in situ hybridization (FISH) fail to detect MLL translocation partner genes (TPGs) in many patients. Long-Distance Inverse (LDI)-PCR, the 'gold standard' technique that is used to characterize MLL breakpoints is laborious and requires a large input of genomic DNA (gDNA). To overcome the limitations of current techniques, a targeted Next-Generation Sequencing (NGS) approach that requires low RNA input was tested...
November 13, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29132547/distribution-of-genes-encoding-resistance-to-aminoglycoside-modifying-enzymes-in-methicillin-resistant-staphylococcus-aureus-mrsa-strains
#10
Azar Dokht Khosravi, Atefeh Jenabi, Effat Abbasi Montazeri
Today Methicillin-Resistant Staphylococcus aureus (MRSA) have acquired multiple resistance to a wide range of antibiotics including aminoglycosides. So, this study was aimed to investigate the rate of aminoglycoside resistance and the frequency of aminoglycoside resistance mediated genes of aac(Ia)-2, aph(3)-IIIa and ant(4')-Ia among MRSA strains. A total of 467 staphylococci isolates were collected from various clinical samples. S. aureus strains were identified by standard culture and identification criteria and investigating of presence of 16S rRNA and nuc genes...
December 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/29131717/in-vitro-effects-of-high-intensity-laser-photobiomodulation-on-equine-bone-marrow-derived-mesenchymal-stem-cell-viability-and-cytokine-expression
#11
Frances J Peat, Aimee C Colbath, Lori M Bentsen, Laurie R Goodrich, Melissa R King
OBJECTIVE: This study aimed to examine the influence of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation on equine bone marrow-derived mesenchymal stem cell (MSC) viability, proliferation, and cytokine expression in vitro. BACKGROUND: Photobiomodulation of cells using monochromatic light is a technique designed to influence cellular processes. Previous studies have shown dose-dependent effects of low-level laser irradiation on cell proliferation and cytokine expression in a range of cell types and species...
November 13, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29129484/detection-of-resistance-to-fluoroquinolones-and-injectable-drugs-among-antituberculosis-drugs-by-allele-specific-primer-extension-on-a-microsphere-based-platform
#12
Kyungjong Kim, Jeong Seong Yang, Hee Baeg Choi, Seung Heon Lee
Molecular drug susceptibility testing (DST) for antituberculosis drugs is important for improving the efficacy of multidrug-resistant tuberculosis (MDR-TB) and extensively drug-resistant tuberculosis (XDR-TB) treatment. In this study, we developed a molecular high-throughput assay system based on allele-specific primer extension (ASPE) and MagPlex-TAG microspheres, referred to here as TAG-ASPE, which can detect mutations related to resistance to injectable second-line drugs and fluoroquinolones. Target genes were amplified by multiplex PCR using DNA from H37Rv and 190 clinical Mycobacterium tuberculosis strains and extended by ASPE using 22 ASPE primers...
November 9, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29128291/detection-of-snps-of-t2dm-susceptibility-genes-by-a-ligase-detection-reaction-fluorescent-nanosphere-technique
#13
Yan Chen, Ying Zhao, Yan-Bo Li, Yan-Jun Wang, Gui-Zhen Zhang
OBJECTIVE: To establish a high throughput, low cost, and simple nanotechnology-based method for the detection of single nucleotide polymorphism (SNP) loci in type 2 diabetes mellitus (T2DM). METHODS: Multiplex ligase detection reaction (LDR) amplification was performed using fluorescently labeled magnetic nanosphere-bound upstream LDR probes and downstream probes labeled with a unique fluorescent group for each SNP locus. The amplified LDR products were separated by magnetic nanospheres and then scanned by fluorescence spectroscopy...
November 9, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29126381/a-genotype-phenotype-study-of-hereditary-multiple-exostoses-in-forty-six-chinese-patients
#14
Yuchan Li, Jian Wang, Zhigang Wang, Jingyan Tang, Tingting Yu
BACKGROUND: Hereditary multiple exostoses (HME) is a rare autosomal dominant skeletal disorder that can cause a variety of clinical manifestations. We aimed to evaluate the general clinical phenotypic severity of HME by using a scoring system and correlate the genotypes with different clinical phenotypes in Chinese patients. METHODS: Forty-six patients from different families were prospectively enrolled. The mutations were identified by direct sequencing of PCR-amplified genomic DNA or by multiplex ligation-dependent probe amplification (MLPA)...
November 10, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/29125964/null-alleles-and-sequence-variations-at-primer-binding-sites-of-str-loci-within-multiplex-typing-systems
#15
Yining Yao, Qinrui Yang, Chengchen Shao, Baonian Liu, Yuxiang Zhou, Hongmei Xu, Yueqin Zhou, Qiqun Tang, Jianhui Xie
Rare variants are widely observed in human genome and sequence variations at primer binding sites might impair the process of PCR amplification resulting in dropouts of alleles, named as null alleles. In this study, 5 cases from routine paternity testing using PowerPlex(®)21 System for STR genotyping were considered to harbor null alleles at TH01, FGA, D5S818, D8S1179, and D16S539, respectively. The dropout of alleles was confirmed by using alternative commercial kits AGCU Expressmarker 22 PCR amplification kit and AmpFℓSTR(®)...
October 28, 2017: Legal Medicine
https://www.readbyqxmd.com/read/29121863/multiplex-real-time-pcr-assay-for-detection-of-escherichia-coli-o157-h7-and-screening-for-non-o157-shiga-toxin-producing-e-coli
#16
Baoguang Li, Huanli Liu, Weimin Wang
BACKGROUND: Shiga toxin-producing Escherichia coli (STEC), including E. coli O157:H7, are responsible for numerous foodborne outbreaks annually worldwide. E. coli O157:H7, as well as pathogenic non-O157:H7 STECs, can cause life-threating complications, such as bloody diarrhea (hemolytic colitis) and hemolytic-uremic syndrome (HUS). Previously, we developed a real-time PCR assay to detect E. coli O157:H7 in foods by targeting a unique putative fimbriae protein Z3276. To extend the detection spectrum of the assay, we report a multiplex real-time PCR assay to specifically detect E...
November 9, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/29119360/optimization-of-a-magnetic-capture-rt-lamp-assay-for-fast-and-real-time-detection-of-potato-virus-y-and-differentiation-of-n-and-o-serotypes
#17
Krzysztof Treder, Joanna Chołuj, Bogumiła Zacharzewska, Lavanya Babujee, Mateusz Mielczarek, Adam Burzyński, Aurélie M Rakotondrafara
Potato virus Y (PVY) infection has been a global challenge for potato production and the leading cause of downgrading and rejection of seed crops for certification. Accurate and timely diagnosis is a key for effective disease control. Here, we have optimized a reverse transcription loop-mediated amplification (RT-LAMP) assay to differentiate the PVY O and N serotypes. The RT-LAMP assay is based on isothermal autocyclic strand displacement during DNA synthesis. The high specificity of this method relies heavily on the primer sets designed for the amplification of the targeted regions...
November 8, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29119308/cryptic-species-anopheles-daciae-diptera-culicidae-found-in-the-czech-republic-and-slovakia
#18
Hana Blažejová, Oldřich Šebesta, František Rettich, Jan Mendel, Viktória Čabanová, Martina Miterpáková, Lenka Betášová, Juraj Peško, Zdeněk Hubálek, Helge Kampen, Ivo Rudolf
We report the distribution of mosquitoes of the maculipennis complex in two distinct areas of the Czech Republic (Bohemia and South Moravia) and in one locality of neighbouring Slovakia with emphasis on the detection of the newly described cryptic species Anopheles daciae (Linton, Nicolescu & Harbach, 2004). A total of 691 mosquitoes were analysed using a species-specific multiplex PCR assay to differentiate between the members of the maculipennis complex. In the Czech Republic, we found Anopheles maculipennis (with a prevalence rate of 1...
November 8, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29119076/are-there-benefits-in-early-diagnosis-of-prosthetic-joint-infection-with-multiplex-polymerase-chain-reaction
#19
Christian Lausmann, Akos Zahar, Mustafa Citak, Julian Brañes, Stefan Schmidl, Lars Frommelt, Thorsten Gehrke, Matthias Gebauer
Purpose Identification of bacteria and susceptibility are fundamental in periprosthetic joint infection (PJI). Especially in the case of systemic inflammatory response syndrome (SIRS) rapid detection of pathogens is essential for proper therapy. Bacterial cultures are time consuming. The polymerase chain reaction (PCR) is a non-culture molecular method and is able to rapidly identify pathogens and their resistance genes. Multiplex PCR (mPCR) can amplify several different DNA sequences simultaneously. The aim of this study was to show the value of mPCR for early diagnosis of PJI...
2017: Journal of bone and joint infection
https://www.readbyqxmd.com/read/29118176/highly-sensitive-detection-of-isoniazid-heteroresistance-in-mycobacterium-tuberculosis-by-deepmelt-assay
#20
Bin Liang, Yaoju Tan, Zi Li, Xueshan Tian, Chen Du, Hui Li, Guoli Li, Xiangyang Yao, Zhongan Wang, Ye Xu, Qingge Li
Detection of heteroresistance of Mycobacterium tuberculosis (MTB) remains challenging using current genotypic drug susceptibility testing methods. Here, we described a melting curve analysis-based approach, termed DeepMelt, that can detect less abundant mutants through selective clamping of the wild-type in mixed populations. Singleplex DeepMelt assay detected 0.01% katG S315T in 10(5) MTB genomes/μL. Multiplex DeepMelt TB/INH detected 1% of mutant species in the four loci associated with isoniazid resistance in 10(4) MTB genomes/μL...
November 8, 2017: Journal of Clinical Microbiology
keyword
keyword
61585
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"