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LAMP PCR

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https://www.readbyqxmd.com/read/28098507/development-and-evaluation-of-a-loop-mediated-isothermal-amplification-lamp-assay-for-the-detection-of-haemonchus-contortus-in-goat-fecal-samples
#1
Xin Yang, Mingwei Qi, Zongze Zhang, Chong Gao, Chunqun Wang, Weiqiang Lei, Li Tan, Junlong Zhao, Rui Fang, Min Hu
Haemonchus contortus is one of the most significant strongylid nematodes infecting small ruminants and causes great economic losses to the livestock industry worldwide. Accurate diagnosis of H. contortus is crucial to control the infection. Traditional microscopic examinations are the most common methods for the diagnosis of H. contortus, but they are time-consuming and inaccurate. Molecular methods based on PCR are more accurate, but need expensive machines usually only used in the laboratory. Loop-mediated isothermal amplification (LAMP) is a rapid, simple, specific and sensitive method that has been widely used to detect viruses, bacteria and parasites...
January 18, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28096624/genetic-variability-and-discrimination-of-low-doses-of-toxocara-spp-from-public-areas-soil-inferred-by-loop-mediated-isothermal-amplification-assay-as-a-field-friendly-molecular-tool
#2
Maryam Ozlati, Adel Spotin, Abbas Shahbazi, Mahmoud Mahami-Oskouei, Teimour Hazratian, Mohammad Adibpor, Ehsan Ahmadpour, Afsaneh Dolatkhah, Paria Khoshakhlagh
ABSTRACT: Aim: One of the main diagnostic problems of conventional polymerase chain reaction (PCR) is indiscrimination of low parasitic loads in soil samples. The aim of this study is to determine the genetic diversity and identification of Toxocara spp. from public areas soil inferred by loop-mediated isothermal amplification (LAMP) assay. MATERIALS AND METHODS: A total of 180 soil samples were collected from various streets and public parks of northwest Iran. The DNA of recovered Toxocara eggs were extracted and amplified by PCR and LAMP following ZnSO4 flotation technique...
December 2016: Veterinary World
https://www.readbyqxmd.com/read/28095434/field-evaluation-of-a-high-throughput-loop-mediated-isothermal-amplification-test-for-the-detection-of-asymptomatic-plasmodium-infections-in-zanzibar
#3
Berit Aydin-Schmidt, Ulrika Morris, Xavier C Ding, Irina Jovel, Mwinyi I Msellem, Daniel Bergman, Atiqul Islam, Abdullah S Ali, Spencer Polley, Iveth J Gonzalez, Andreas Mårtensson, Anders Björkman
BACKGROUND: New field applicable diagnostic tools are needed for highly sensitive detection of residual malaria infections in pre-elimination settings. Field performance of a high throughput DNA extraction system for loop mediated isothermal amplification (HTP-LAMP) was therefore evaluated for detecting malaria parasites among asymptomatic individuals in Zanzibar. METHODS: HTP-LAMP performance was evaluated against real-time PCR on 3008 paired blood samples collected on filter papers in a community-based survey in 2015...
2017: PloS One
https://www.readbyqxmd.com/read/28093275/reverse-transcription-loop-mediated-isothermal-amplification-for-rapid-detection-of-respiratory-syncytial-virus-directly-from-nasopharyngeal-swabs
#4
Johannes Hoos, Rebecca Marie Peters, Julia Tabatabai, Jürgen Grulich-Henn, Paul Schnitzler, Johannes Pfeil
Respiratory syncytial virus (RSV) is a common cause of lower respiratory tract infection in young infants and a major cause of nosocomial infection in pediatric care. Currently available RSV point-of-care tests are of limited sensitivity and relatively expensive. We developed and evaluated a novel RSV rapid test for use at point-of-care, based on reverse-transcription loop-mediated isothermal amplification (RT-LAMP) for direct testing of nasopharyngeal swab specimens. RT-LAMP can detect RSV within 30min, without the need for RNA extraction...
January 13, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28086864/direct-detection-of-falciparum-and-non-falciparum-malaria-dna-from-a-drop-of-blood-with-high-sensitivity-by-the-dried-lamp-system
#5
Kyoko Hayashida, Kiichi Kajino, Humphrey Simukoko, Martin Simuunza, Joseph Ndebe, Amos Chota, Boniface Namangala, Chihiro Sugimoto
BACKGROUND: Because of the low sensitivity of conventional rapid diagnostic tests (RDTs) for malaria infections, the actual prevalence of the diseases, especially those caused by non-Plasmodium falciparum (non-Pf) species, in asymptomatic populations remain less defined in countries lacking in well-equipped facilities for accurate diagnoses. Our direct blood dry LAMP system (CZC-LAMP) was applied to the diagnosis of malaria as simple, rapid and highly sensitive method as an alternative for conventional RDTs in malaria endemic areas where laboratory resources are limited...
January 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28086789/detection-of-plasmodium-knowlesi-plasmodium-falciparum-and-plasmodium-vivax-using-loop-mediated-isothermal-amplification-lamp-in-a-co-endemic-area-in-malaysia
#6
Kim A Piera, Ammar Aziz, Timothy William, David Bell, Iveth J González, Bridget E Barber, Nicholas M Anstey, Matthew J Grigg
BACKGROUND: Plasmodium knowlesi is the most common cause of malaria in Malaysia. However, microscopic diagnosis is inaccurate and rapid diagnostic tests (RDTs) are insufficiently sensitive. PCR is sensitive and specific but not feasible at a district level. Loop-mediated isothermal amplification (LAMP) shows potential with only basic requirements. A commercially available LAMP assay, the Eiken Loopamp™ MALARIA Pan Detection kit, is sensitive for Plasmodium falciparum and Plasmodium vivax, but has not previously been evaluated for P...
January 13, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28081383/inhibiting-effect-of-lithium-chloride-on-endotoxin-induced-uveitis-in-rats
#7
Shuo Yang, Shuo Yu, Xinli Liu, Jinyi Yu, Xiaosheng Zhang, Hong Lu
PURPOSE: To evaluate the anti-inflammatory effect of lithium chloride in endotoxin-induced uveitis. METHODS: A total of 200 Wistar rats were randomly divided into four groups: a control group; EIU group; LiCl-treated control group; and LiCl-treated lipopolysaccharide group. Clinical score, slit-lamp photography, hematoxylin and eosin (H&E) staining were used to determine the degree of inflammatory reaction. Level of glycogen synthase kinase3-beta and nuclear factor-kappa B p65 in iris-ciliary body was examined by western blot and RT-PCR...
January 12, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28073898/two-stage-isothermal-enzymatic-amplification-for-concurrent-multiplex-molecular-detection
#8
Jinzhao Song, Changchun Liu, Michael G Mauk, Shelley C Rankin, James B Lok, Robert M Greenberg, Haim H Bau
BACKGROUND: The wide array of pathogens responsible for infectious diseases makes it difficult to identify causative pathogens with single-plex tests. Although multiplex PCR detects multiple targets, it is restricted to centralized laboratories, which delays test results or makes multiplexing unavailable, depriving healthcare providers of critical, real-time information. METHODS: To address the need for point-of-care (POC) highly multiplexed tests, we propose the 2-stage, nested-like, rapid (<40 min) isothermal amplification assay, dubbed rapid amplification (RAMP)...
January 10, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28073413/-cellular-and-molecular-mechanisms-of-anti-inflammatory-effect-of-peroxisome-proliferator-activated-receptor-%C3%AE
#9
M J Jiao, L Zhou, F Ren, Y D Wang, C Shen, Z P Duan, C Y Zhao
Objective: To investigate the cellular and molecular mechanisms of the anti-inflammatory effect of peroxisome proliferator-activated receptor α (PPARα). Methods: Firstly, bone marrow-derived macrophages (BMDMs) were randomly divided into control group, LPS group, WY14643 10 μmol/L group, WY14643 25 μmol/L group, and WY14643 50 μmol/L group using a random number table. Secondly, BMDMs were randomly divided into LPS group, WY14643+LPS group, and 3-MA+WY14643+LPS group. Primary BMDMs were stimulated by LPS (20 ng/ml) to establish the cellular model of inflammation...
December 20, 2016: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28070163/development-of-reverse-transcription-loop-mediated-isothermal-amplification-for-simple-and-rapid-detection-of-promyelocytic-leukemia-retinoic-acid-receptor-%C3%AE-mrna
#10
Yuki Hashimoto, Yuki Hatayama, Nao Kojima, Shota Morishita, Satoko Matsumoto, Yuzuru Hosoda, Ayako Hara, Toru Motokura
BACKGROUND: Acute promyelocytic leukemia (APL) is a disease characterized by expression of Promyelocytic Leukemia-Retinoic Acid Receptor α (PML-RARα) chimeric mRNA. Although APL is curable, early death due to hemorrhage is a major problem. Here, we report the development of a simple and rapid diagnostic method for APL based on reverse transcription loop-mediated isothermal amplification (RT-LAMP). METHODS: An RT-LAMP primer set was designed to detect three types of PML-RARα mRNA in a single reaction...
December 2016: Yonago Acta Medica
https://www.readbyqxmd.com/read/28062426/tuberculous-scleral-abscess-with-choroidal-detachment
#11
Swapnil Madhukar Parchand, Aswanthi Sadesh Kumar, Subashini Kaliaperumal, Renuka Srinivasan
We present a case of ocular tuberculosis (TB) presenting as scleral abscess with choroidal detachment. A 60-year-old woman presented with intense pain, redness, watering and decreased vision in the right eye (RE) for 1 week duration. Slit lamp examination of RE revealed diffuse scleritis with two pus-pointing areas in the supero-temporal quadrant suggesting scleral abscess. Fundus examination of the RE showed choroidal detachment in the temporal and inferior quadrant. Left eye examination was unremarkable...
January 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28061871/lamp-kit-for-diagnosis-of-non-falciparum-malaria-in-plasmodium-ovale-infected-patients
#12
Juan Cuadros, Alexandra Martin Ramírez, Iveth J González, Xavier C Ding, Ramon Perez Tanoira, Gerardo Rojo-Marcos, Peña Gómez-Herruz, Jose Miguel Rubio
BACKGROUND: Microscopy and rapid diagnosis tests have a limited sensitivity in diagnosis of malaria by Plasmodium ovale. The LAMP kit (LoopAMP®) can be used in the field without special equipment and could have an important role in malaria control programmes in endemic areas and for malaria diagnosis in returned travellers. The performance of the Pan primer of the kit in detecting malaria by P. ovale was compared with the results of standard nPCR in samples of patients returning from P...
January 7, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28061549/fast-and-simple-detection-methods-for-the-4-base-pair-deletion-of-canine-mdr1-abcb1-gene-by-pcr-and-isothermal-amplification
#13
Cathrin P Stiedl, Karin Weber
Dogs with a 4-bp deletion in the MDR1 (or ABCB1) gene show intolerance to certain drugs routinely used in veterinary medicine, such as ivermectin, vincristine, and doxorubicin. The mutation leads to a dysfunctional P-glycoprotein drug transporter, which results in drug accumulation in the brain and severe neurotoxicity. A rapid and accurate in-house test to determine the genotype of patients in cases of acute neurotoxic signs or in tumor patients is desirable. We describe a cost-effective detection method with simple technical equipment for veterinary practice...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28057061/congenital-infection-with-atypical-porcine-pestivirus-appv-is-associated-with-disease-and-viral-persistence
#14
Lukas Schwarz, Christiane Riedel, Sandra Högler, Leonie J Sinn, Thomas Voglmayr, Bettina Wöchtl, Nora Dinhopl, Barbara Rebel-Bauder, Herbert Weissenböck, Andrea Ladinig, Till Rümenapf, Benjamin Lamp
In 2013, several Austrian piglet-producing farms recorded outbreaks of action-related repetitive myoclonia in newborn piglets ("shaking piglets"). Malnutrition was seen in numerous piglets as a complication of this tremor syndrome. Overall piglet mortality was increased and the number of weaned piglets per sow decreased by more than 10% due to this outbreak. Histological examination of the CNS of affected piglets revealed moderate hypomyelination of the white substance in cerebellum and spinal cord. We detected a recently discovered pestivirus, termed atypical porcine pestivirus (APPV) in all these cases by RT-PCR...
January 6, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28056092/improvement-and-evaluation-of-loop-mediated-isothermal-amplification-for-rapid-detection-of-toxoplasma-gondii-infection-in-human-blood-samples
#15
Xi-Meng Sun, Yong-Sheng Ji, Xian-Yong Liu, Mei Xiang, Guang He, Li Xie, Jing-Xia Suo, Xun Suo
Loop-mediated isothermal amplification (LAMP), an attractive DNA amplification method, was developed as a valuable tool for the rapid detection of Toxoplasma gondii. In this study, species-specific LAMP primers were designed by targeting the AF146527 sequence, which was a conserved sequence of 200- to 300-fold repetitive 529 bp fragment of T.gondii. LAMP reaction system was optimized so that it could detect the minimal DNA sample such as a single tachyzoite or 10 copies of recombinant plasmid. No cross-reactivity was found when using DNA from other parasites as templates...
2017: PloS One
https://www.readbyqxmd.com/read/28013043/a-field-evaluation-of-an-isothermal-dna-amplification-assay-for-the-detection-of-theileria-annulata-infection-in-cattle
#16
Jacinto Gomes, Marcos Santos, Ana Amaro, Isabel Pereira da Fonseca, Gabriela Santos-Gomes, João Inácio
A loop-mediated isothermal amplification (LAMP) assay was evaluated for the detection of Theileria annulata infection in cattle. The results were compared with a real-time PCR used for the quantification of T. annulata parasitaemia. One hundred bovine blood samples from 16 cattle farms were tested with LAMP and real-time PCR, with T. annulata DNA being detected in 66% and 67% of the samples, respectively. The results showed that the LAMP assay detects a parasitaemia as low as 0.00025%, indicating a high analytical sensitivity of LAMP for clinical diagnosis of bovine theileriosis...
December 22, 2016: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/27965036/fast-detection-of-southern-tomato-virus-by-one-step-transcription-loop-mediated-isothermal-amplification-rt-lamp
#17
L Elvira-González, A V Puchades, C Carpino, A Alfaro-Fernandez, M I Font-San-Ambrosio, L Rubio, L Galipienso
Southern tomato virus (STV) is a double stranded RNA (dsRNA) virus belonging to genus Amalgavirus (family Amalgamaviridae) which has been detected in tomato plants showing stunting, fruit discoloration and size reduction. A one-step reverse-transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed for the detection of STV in total RNA or sap extracts (obtained just by grinding in buffer) from STV-infected tomato plants by using a set of three primers pairs which were designed to the sequence of the STV putative coat protein...
December 10, 2016: Journal of Virological Methods
https://www.readbyqxmd.com/read/27965010/a-novel-cmos-image-sensor-system-for-quantitative-loop-mediated-isothermal-amplification-assays-to-detect-food-borne-pathogens
#18
Tiantian Wang, Sanghyo Kim, Jeong Ho An
Loop-mediated isothermal amplification (LAMP) is considered as one of the alternatives to the conventional PCR and it is an inexpensive portable diagnostic system with minimal power consumption. The present work describes the application of LAMP in real-time photon detection and quantitative analysis of nucleic acids integrated with a disposable complementary-metal-oxide semiconductor (CMOS) image sensor. This novel system works as an amplification-coupled detection platform, relying on a CMOS image sensor, with the aid of a computerized circuitry controller for the temperature and light sources...
December 10, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27964846/corrigendum-to-giardia-and-cryptosporidium-spp-dissemination-during-wastewatertreatment-and-comparative-detection-via-immunofluorescence-assay-ifa-nested-polymerase-chain-reaction-nested-pcr-and-loopmediated-isothermal-amplification-lamp-acta-trop-158-2016
#19
Carmen Gallas-Lindemann, Isaia Sotiriadou, Judit Plutzer, Michael J Noack, Mohammad Reza Mahmoudi, Panagiotis Karanis
No abstract text is available yet for this article.
February 2017: Acta Tropica
https://www.readbyqxmd.com/read/27958360/diagnostic-test-accuracy-of-loop-mediated-isothermal-amplification-assay-for-mycobacterium-tuberculosis-systematic-review-and-meta-analysis
#20
Kenjiro Nagai, Nobuyuki Horita, Masaki Yamamoto, Toshinori Tsukahara, Hideyuki Nagakura, Ken Tashiro, Yuji Shibata, Hiroki Watanabe, Kentaro Nakashima, Ryota Ushio, Misako Ikeda, Atsuya Narita, Akinori Kanai, Takashi Sato, Takeshi Kaneko
Diagnostic test accuracy of the loop-mediated isothermal amplification (LAMP) assay for culture proven tuberculosis is unclear. We searched electronic databases for both cohort and case-control studies that provided data to calculate sensitivity and specificity. The index test was any LAMP assay including both commercialized kits and in-house assays. Culture-proven M. tuberculosis was considered a positive reference test. We included 26 studies on 9330 sputum samples and one study on 315 extra-pulmonary specimens...
December 13, 2016: Scientific Reports
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