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LAMP PCR

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https://www.readbyqxmd.com/read/28493440/tear-production-intraocular-pressure-and-conjunctival-bacterial-flora-in-selected-captive-wild-ruminants
#1
Pavel Kvapil, Tina Pirš, Brigita Slavec, Roman Luštrik, Tadej Zemljič, Eva Bártová, Bojana Stranjac, Marjan Kastelic
OBJECTIVE: Evaluation of tear production (Schirmer's tear test, STT) and measurement of intraocular pressure (IOP) were performed in a population of captive wild ungulates in a Slovenian ZOO during routine annual health check. ANIMALS STUDIED: In total, 10 fallow deer (Dama dama), 25 mouflons (Ovis aries musimon), 20 alpine ibexes (Capra ibex), and three alpine chamois (Rupicapra rupicapra) were included in the study. METHODS: Tear production was performed by Schirmer's tear test, IOP was measured with an applanation tonometer, and ophthalmological examination was conducted with slit-lamp biomicroscopy and indirect ophthalmoscopy...
May 11, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28493052/development-of-a-colorimetric-reverse-transcription-loop-mediated-isothermal-amplification-assay-for-the-detection-of-mirafiori-lettuce-big-vein-virus
#2
Mohammad Amin Almasi
An RT-LAMP assay was developed to detect Mirafiori lettuce big vein virus (MiLBVV) and was compared with DAS-ELISA and RT-PCR. All primers were designed on the basis of the coat protein gene of the virus. In addition, a novel immunocapture (IC) RT-LAMP assay for rapid and easy detection of MiLBVV was developed, and factors such as safety, simplicity, cost, user-friendliness and safety were compared with those of DAS-ELISA, RT-PCR and RT-LAMP assays. Compared with DAS-ELISA and RT-PCR, RT-LAMP and IC-RT-LAMP had higher sensitivity (100-fold) but similar specificity, with the advantage of a shorter assay time and no need for RNA extraction (in IC-RT-LAMP)...
May 10, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28475701/crispr-cas9-mediated-mutation-of-%C3%AE-a-crystallin-gene-induces-congenital-cataracts-in-rabbits
#3
Lin Yuan, Haobin Yao, Yuxin Xu, Mao Chen, Jichao Deng, Yuning Song, Tingting Sui, Yong Wang, Yongye Huang, Zhanjun Li, Liangxue Lai
Purpose: The present study aimed to investigate the role of the αA-crystallin gene in inducing congenital cataracts in rabbits and to construct a novel animal model for characterization and pathologic analysis of congenital cataracts for future research. Methods: We generated αA-crystallin gene knockout rabbits with congenital cataracts by coinjection of Cas9 mRNA and sgRNA into zygotes. Cataract phenotypes were investigated in a repeated study of 19 F0-generation and 11 F1-generation rabbits with αA-crystallin gene mutations...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28465659/comparison-of-fibrin-glue-and-vicryl-sutures-in-conjunctival-autografting-for-pterygium-surgery
#4
Xiu Wang, Yan Zhang, Lei Zhou, Ruihua Wei, Lijie Dong
PURPOSE: To compare clinical parameters and the tear levels of inflammatory cytokines between pterygium surgery using sutures or fibrin glue. METHODS: Fifty-six patients with primary pterygium were divided into the suture group and the glue group, in which the autograft was secured with 10-0 Vicryl sutures and fibrin glue, respectively. A questionnaire, slit-lamp examination, Schirmer test, and visual acuity test were performed in all participants. Real-time quantitative PCR (q-PCR) was used to analyze the expression of genes in pterygium and healthy conjunctival tissues...
2017: Molecular Vision
https://www.readbyqxmd.com/read/28444886/detection-of-mycobacterium-avium-subsp-paratuberculosis-in-non-human-primates
#5
Kim Fechner, Kerstin Mätz-Rensing, Karen Lampe, Franz-Josef Kaup, Claus-Peter Czerny, Jenny Schäfer
BACKGROUND: Due to a sporadic occurrence of Mycobacterium avium subsp. paratuberculosis (MAP) in non-human primates (NHP), the susceptibility of different NHP to MAP should be investigated. METHODS: Fecal and tissue samples (ileum, ileocecal lymph node, bone marrow) of 20 animals (seven species) were analyzed by IS900-based PCRs and sequenced. Samples of MAP PCR positive NHP were further cultivated. RESULTS: MAP DNA was detectable in two animals; the ileum of a cottontop tamarin and the bone marrow of a common marmoset...
April 26, 2017: Journal of Medical Primatology
https://www.readbyqxmd.com/read/28438685/genotypic-detection-of-the-blactx-m-1-gene-among-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae
#6
Amornrat Thuengern, Surakit Nathisuwan, Mullika T Chomnawang, Chanpen Wiwat, Krit Thirapanmethee
OBJECTIVES: Extended-spectrum β-lactamases (ESBLs), a group of β-lactamase enzymes produced by bacteria in the family Enterobacteriaceae, are becoming a major problem in the healthcare community worldwide. Although many attempts have been made in the detection of ESBL-producing bacteria, the cost and speed of detection remains an important challenge. Therefore, this study aimed to develop a rapid, effective and affordable method for detection of the blaCTX-M-1 ESBL gene by a loop-mediated isothermal amplification (LAMP) technique...
April 21, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28427352/point-of-sampling-detection-of-zika-virus-within-a-multiplexed-kit-capable-of-detecting-dengue-and-chikungunya
#7
Ozlem Yaren, Barry W Alto, Priyanka V Gangodkar, Shatakshi R Ranade, Kunal N Patil, Kevin M Bradley, Zunyi Yang, Nikhil Phadke, Steven A Benner
BACKGROUND: Zika, dengue, and chikungunya are three mosquito-borne viruses having overlapping transmission vectors. They cause diseases having similar symptoms in human patients, but requiring different immediate management steps. Therefore, rapid (< one hour) discrimination of these three viruses in patient samples and trapped mosquitoes is needed. The need for speed precludes any assay that requires complex up-front sample preparation, such as extraction of nucleic acids from the sample...
April 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28427163/the-application-of-is6110-baced-loop-mediated-isothermal-amplification-lamp-in-the-early-diagnosis-of-tuberculous-meningitis
#8
Wen-Wen Sun, Qin Sun, Li-Ping Yan, Qing Zhang
Here, we evaluated the potential activity of rapid Mycobacterium tuberculosis detection with loop-mediated isothermal amplification (LAMP), for the early diagnosis of tuberculous meningitis (TBM). Patients with suspected TBM from January 2014 to December 2015 were reviewed retrospectively. The cerebrospinalfluid(CSF) was collected. Acid-fast bacillus (AFB) staining, MGIT 960 culture, real-time fluorescent quantitative polymerase chain reaction (RTFQ PCR) and LAMP were performed. A total of 200 patients were included in the study...
February 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28424530/molecular-diagnostic-assays-based-on-cpn60-ut-sequences-reveal-the-geographic-distribution-of-subgroup-16srxiii-a-i-i-phytoplasma-in-mexico
#9
Edel Pérez-López, Douglas Rodríguez-Martínez, Chrystel Y Olivier, Mauricio Luna-Rodríguez, Tim J Dumonceaux
Geographically diverse samples from strawberry exhibiting symptoms of Strawberry Green Petal (SbGP), periwinkle plants with virescence, and blackberry, blueberry, and raspberry plants displaying yellowing and inedible fruits, were assayed for the presence of phytoplasma DNA. PCR targeting the 16S rRNA-encoding gene and chaperonin-60 (cpn60) showed that the plants were infected with phytoplasma subgroup16SrXIII-(A/I)I (SbGP/MPV). To examine the geographic distribution of this pathogen in Mexico, we designed an array of cpn60-targeted molecular diagnostic assays for SbGP/MPV phytoplasma...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28381965/development-and-evaluation-of-loop-mediated-isothermal-amplification-assay-for-rapid-detection-of-tylenchulus-semipenetrans-using-dna-extracted-from-soil
#10
Zhi-Qiang Song, Ju-E Cheng, Fei-Xue Cheng, De-Yong Zhang, Yong Liu
Tylenchulus semipenetrans is an important and widespread plant-parasitic nematode of citrus worldwide and can cause citrus slow decline disease leading to significant reduction in tree growth and yield. Rapid and accurate detection of T. semipenetrans in soil is important for the disease forecasting and management. In this study, a loop-mediated isothermal amplification (LAMP) assay was developed to detect T. semipenetrans using DNA extracted from soil. A set of five primers was designed from the internal transcribed spacer region (ITS1) of rDNA, and was highly specific to T...
April 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28368036/rapid-simple-and-direct-detection-of-meloidogyne-hapla-from-infected-root-galls-using-loop-mediated-isothermal-amplification-combined-with-fta-technology
#11
Huan Peng, Haibo Long, Wenkun Huang, Jing Liu, Jiangkuan Cui, Lingan Kong, Xianqi Hu, Jianfeng Gu, Deliang Peng
The northern root-knot nematode (Meloidogyne hapla) is a damaging nematode that has caused serious economic losses worldwide. In the present study, a sensitive, simple and rapid method was developed for detection of M. hapla in infested plant roots by combining a Flinders Technology Associates (FTA) card with loop-mediated isothermal amplification (LAMP). The specific primers of LAMP were designed based on the distinction of internal transcribed spacer (ITS) sequences between M. hapla and other Meloidogyne spp...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28359328/stem-loop-mediated-isothermal-amplification-test-comparative-analysis-with-classical-lamp-and-pcr-in-detection-of-entamoeba-histolytica-in-kenya
#12
COMPARATIVE STUDY
Fridah Mwendwa, Cecilia K Mbae, Johnson Kinyua, Erastus Mulinge, Gitonga Nkanata Mburugu, Zablon K Njiru
BACKGROUND: Entamoeba histolytica, the causative agent for amoebiasis is a considerable burden to population in the developing countries where it accounts for over 50 million infections. The tools for detection of amoebiasis are inadequate and diagnosis relies on microscopy which means a significant percent of cases remain undiagnosed. Moreover, tests formats that can be rapidly applied in rural endemic areas are not available. METHODS: In this study, a loop-mediated isothermal test (LAMP) based on 18S small subunit ribosomal RNA gene was designed with extra reaction accelerating primers (stem primers) and compared with the published LAMP and PCR tests in detection of E...
March 31, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28356221/rapid-detection-of-all-known-ebolavirus-species-by-reverse-transcription-loop-mediated-isothermal-amplification-rt-lamp
#13
Olamide K Oloniniyi, Yohei Kurosaki, Hiroko Miyamoto, Ayato Takada, Jiro Yasuda
Ebola virus disease (EVD), a highly virulent infectious disease caused by ebolaviruses, has a fatality rate of 25-90%. Without a licensed chemotherapeutic agent or vaccine for the treatment and prevention of EVD, control of outbreaks requires accurate and rapid diagnosis of cases. In this study, five sets of six oligonucleotide primers targeting the nucleoprotein gene were designed for specific identification of each of the five ebolavirus species using reverse transcription-loop mediated isothermal amplification (RT-LAMP) assay...
March 27, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28352046/evaluation-of-sybr-green-i-based-visual-loop-mediated-isothermal-amplification-lamp-assay-for-genus-and-species-specific-diagnosis-of-malaria-in-p-vivax-and-p-falciparum-endemic-regions
#14
COMPARATIVE STUDY
Ruchi Singh, Dhirendra Pratap Singh, Deepali Savargaonkar, Om P Singh, Rajendra M Bhatt, Neena Valecha
BACKGROUND & OBJECTIVES: Loop-mediated isothermal amplification (LAMP) is an emerging nucleic acid based diag- nostic approach that is easily adaptable to the field settings with limited technical resources. This study was aimed to evaluate the LAMP assay for the detection and identification of Plasmodium falciparum and P. vivax infection in malaria suspected cases using genus and species-specific assay. METHODS: The 18S rRNA-based LAMP assay was evaluated for diagnosis of genus Plasmodium, and species- specific diagnosis of P...
January 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/28351721/a-rapid-simple-and-sensitive-loop-mediated-isothermal-amplification-method-to-detect-anaplasma-bovis-in-sheep-and-goats-samples
#15
Jinhong Wang, Yan Zhang, Yanyan Cui, Yaqun Yan, Xiaoxing Wang, Rongjun Wang, Fuchun Jian, Longxian Zhang, Changshen Ning
A loop-mediated isothermal amplification (LAMP) technique has been widely used in detecting the nucleic acid of various pathogenic bacteria. In this study, a set of four LAMP primers was designed to specifically test Anaplasma bovis. The LAMP assay was performed at 62°C for 60min in a water bath. The specificity was confirmed by amplifying A. bovis isolate, while no cross reaction was observed with other five pathogens (Anaplasma bovis, Anaplasma phagocytophilum, Theileria luwenshuni, Babesia motasi and Schistosoma japonicum)...
March 25, 2017: Parasitology International
https://www.readbyqxmd.com/read/28349967/development-of-a-multiplex-loop-mediated-isothermal-amplification-method-for-the-simultaneous-detection-of-salmonella-spp-and-vibrio-parahaemolyticus
#16
Ningwei Liu, Dayang Zou, Derong Dong, Zhan Yang, Da Ao, Wei Liu, Liuyu Huang
Rapid detection of food-borne pathogens is important in the food industry, to monitor and prevent the spread of these pathogens through contaminated food products. We therefore established a multiplex real-time loop-mediated isothermal amplification (LAMP) assay to simultaneously detect and distinguish Salmonella spp. and Vibrio parahaemolyticus DNA in a single reaction. Two target sequences, one specific for Salmonella and the other specific for Vibrio parahaemolyticus, were amplified by specific LAMP primers in the same reaction tube...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28349355/polymerase-spiral-reaction-psr-a-novel-visual-isothermal-amplification-method-for-detection-of-canine-parvovirus-2-genomic-dna
#17
Vikas Gupta, Soumendu Chakravarti, Vishal Chander, Saurabh Majumder, Shabir Ahmad Bhat, Vivek Kumar Gupta, Sukdeb Nandi
Canine parvovirus-2 (CPV-2), which is ubiquitously distributed worldwide, causes severe and often fatal gastroenteritis in dogs. Accurate, differential and rapid diagnosis of canine parvoviral enteritis remains a challenge for clinicians. A recently developed isothermal amplification technique, polymerase spiral reaction (PSR), was optimized for the first time for a viral pathogen with reference recombinant plasmid standards from different CPV-2 antigenic variants (CPV-2, CPV-2a, CPV-2b and CPV-2c) and subsequently validated using clinical samples...
March 27, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28339040/detection-assay-for-hpv16-and-hpv18-by-loop%C3%A2-mediated-isothermal-amplification-with-lateral-flow-dipstick-tests
#18
Ratchanida Kumvongpin, Patcharee Jearanaikoon, Chotchana Wilailuckana, Nattaya Sae-Ung, Prinya Prasongdee, Sakda Daduang, Metee Wongsena, Patcharee Boonsiri, Wansika Kiatpathomchai, Sukumarn Sanersak Swangvaree, Alisa Sandee, Jureerut Daduang
Cervical cancer is the third highest cause of death in developing countries and most commonly results from high‑risk human papillomavirus (HR‑HPV) infection. Among HR‑HPV genotypes, HPV16 and HPV18 are the most prevalent in cervical cancers. Therefore, the present study aimed to develop a detection assay for HPV16 and HPV18 infection using loop‑mediated isothermal amplification (LAMP) with lateral flow dipstick (LFD) tests. This assay is a simplified, user‑friendly method for the visual detection of HPV genotypes...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28338022/alizarin-red-s-for-online-pyrophosphate-detection-identified-by-a-rapid-screening-method
#19
Jens Fischbach, Qiuting Loh, Frank F Bier, Theam Soon Lim, Marcus Frohme, Jörn Glökler
We identified Alizarin Red S and other well known fluorescent dyes useful for the online detection of pyrophosphate in enzymatic assays, including the loop mediated isothermal amplification (LAMP) and polymerase chain reaction (PCR) assays. An iterative screening was used for a selected set of compounds to first secure enzyme compatibility, evaluate inorganic pyrophosphate sensitivity in the presence of manganese as quencher and optimize conditions for an online detection. Of the selected dyes, the inexpensive alizarin red S was found to selectively detect pyrophosphate under LAMP and PCR conditions and is superior with respect to its defined red-shifted spectrum, long shelf life and low toxicity...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28335829/comparison-of-nasopharyngeal-and-guttural-pouch-specimens-to-determine-the-optimal-sampling-site-to-detect-streptococcus-equi-subsp-equi-carriers-by-dna-amplification
#20
Ashley G Boyle, Darko Stefanovski, Shelley C Rankin
BACKGROUND: Streptococcus equi subsp equi (S. equi) is the cause of "equine strangles" which is a highly infectious upper respiratory disease. Detection of S. equi is influenced by site of specimen collection, method of sampling, and type of diagnostic test that is performed. We hypothesized i) that a loop-mediated isothermal amplification (LAMP) assay that targets the S. equi-specific eqbE gene would be more sensitive than a realtime PCR assay that targets the S. equi-specific seeI gene and ii) that LAMP of specimens obtained by guttural pouch lavage (GPL) would be more sensitive than LAMP of nasopharyngeal specimens to identify S...
March 23, 2017: BMC Veterinary Research
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