51
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Chatzinasiou E, Dovas C, Papanastassopoulou M, Georgiadis M, Psychas V, Bouzalas I, Koumbati M, Koptopoulos G, Papadopoulos O. Assessment of bluetongue viraemia in sheep by real-time PCR and correlation with viral infectivity. J Virol Methods 2010; 169:305-15. [DOI: 10.1016/j.jviromet.2010.07.033] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 07/09/2010] [Accepted: 07/29/2010] [Indexed: 01/10/2023]
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52
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Steinrigl A, Revilla-Fernández S, Eichinger M, Koefer J, Winter P. Bluetongue virus RNA detection by RT-qPCR in blood samples of sheep vaccinated with a commercially available inactivated BTV-8 vaccine. Vaccine 2010; 28:5573-81. [DOI: 10.1016/j.vaccine.2010.06.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 04/21/2010] [Accepted: 06/10/2010] [Indexed: 10/19/2022]
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53
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Detection and quantitation of bluetongue virus serotypes by a TaqMan probe-based real-time RT-PCR and differentiation from epizootic hemorrhagic disease virus. J Virol Methods 2010; 168:237-41. [PMID: 20435069 DOI: 10.1016/j.jviromet.2010.04.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Revised: 04/18/2010] [Accepted: 04/22/2010] [Indexed: 11/22/2022]
Abstract
Twenty-four serotypes of bluetongue virus (BTV) have been recognized world wide. Reliable and quantitative assays of virus universal detection are essential for fighting against BT. A real-time reverse transcription-polymerase chain reaction (RT-PCR) with a TaqMan fluorescence probe has been developed for detection of the NS1 gene of different BTV serotypes. In BHK-21 cells, in the assay detected BTV1-22 specifically, and had no cross-reactivity with the closely related epizootic hemorrhagic disease virus (EHDV) serotypes 1-5. The limit of sensitivity of the assay was 0.1 TCID(50)/ml for BTV-1 and 10(2) copies for the control R121/pGEM. Accurate quantitation can be achieved with samples containing between 10(2) and 10(6) copies. The coefficient of variation (CV) of intra-assay and inter-assay ranged from 2.17% to 5.60%. The developed real-time RT-PCR assay showed good coincident rate (99.2%) with duplex RT-PCR in 122 whole blood clinical samples from sheep. Therefore, the real-time RT-PCR can be a reliable method for detection of various serotypes of BTV.
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54
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Hofmann MA, Renzullo S, Planzer J, Mader M, Chaignat V, Thuer B. Detection of Toggenburg Orbivirus by a segment 2-specific quantitative RT-PCR. J Virol Methods 2010; 165:325-9. [DOI: 10.1016/j.jviromet.2010.02.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Revised: 02/18/2010] [Accepted: 02/22/2010] [Indexed: 10/19/2022]
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55
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Leblanc N, Rasmussen TB, Fernández J, Sailleau C, Rasmussen LD, Uttenthal A, Zientara S, Belák S, Hakhverdyan M. Development of a real-time RT-PCR assay based on primer-probe energy transfer for the detection of all serotypes of bluetongue virus. J Virol Methods 2010; 167:165-71. [PMID: 20380853 DOI: 10.1016/j.jviromet.2010.03.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Revised: 03/25/2010] [Accepted: 03/29/2010] [Indexed: 11/24/2022]
Abstract
A real-time RT-PCR assay based on the primer-probe energy transfer (PriProET) was developed to detect all 24 serotypes of bluetongue virus (BTV). BTV causes serious disease, primarily in sheep, but in other ruminants as well. A distinguishing characteristic of the assay is its tolerance toward mutations in the probe region. Furthermore, melting curve analysis following immediately PCR confirms specific probe hybridization and can reveal mutations in the probe region by showing a difference in the melting point. The assay sensitivity was in the range of 10-100 target copies and the specificity tests showed no positive results for heterologous pathogens. The assay was tested on clinical samples from BTV 8 outbreaks in Sweden and Denmark in 2008. The lowest detection limit for that serotype, determined with PCR standards, was 57 genome copies. The assay sensitivity for some other serotypes that circulate currently in Europe was also determined. BTV 2, 4, 9 and 16 were tested on available cell culture samples and the detection limits were 109, 12, 13 and 24 copies, respectively. This assay provides an important tool for early and rapid detection of a wide range of BTV strains, including emerging strains.
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Affiliation(s)
- N Leblanc
- Joint Research and Development Division, Department of Virology, the National Veterinary Institute, Uppsala, Sweden.
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56
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Batten C, van Rijn P, Oura C. Detection of the European ‘field’ strain of bluetongue virus serotype 6 by real-time RT-PCR. Vet Microbiol 2010; 141:186-8. [DOI: 10.1016/j.vetmic.2009.08.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 07/09/2009] [Accepted: 08/03/2009] [Indexed: 10/20/2022]
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57
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Ortega J, Crossley B, Dechant JE, Drew CP, MacLachlan NJ. Fatal Bluetongue Virus Infection in an Alpaca (Vicugna Pacos) in California. J Vet Diagn Invest 2010; 22:134-6. [DOI: 10.1177/104063871002200129] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In October 2008, a 15-year-old female alpaca ( Vicugna pacos) housed at a breeding farm in northern California died after a brief illness characterized by sudden onset of weakness, recumbency, and respiratory distress. Postmortem examination revealed severe hydrothorax and hydropericardium, marked pulmonary edema, and acute superficial myocardial hemorrhage affecting the left ventricle. Bluetongue virus (BTV) was detected in the spleen by quantitative real-time reverse transcription polymerase chain reaction and confirmed by sequence analysis. No antibodies against BTV were detected in the serum using a competitive enzyme-linked immunosorbent assay, confirming acute, fulminant BTV infection.
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Affiliation(s)
- Joaquín Ortega
- California Animal Health and Food Safety Laboratory–Davis Branch
- Department of Animal Health, School of Veterinary Medicine, University CEU Cardenal Herrera, Valencia, Spain
| | - Beate Crossley
- California Animal Health and Food Safety Laboratory–Davis Branch
| | - Julie E. Dechant
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA
| | - Clifton P. Drew
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA
| | - N. James MacLachlan
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA
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58
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Ye Q, Zhuang H, Zhou C, Wang Q. Real-time fluorescent quantitative immuno-PCR method for determination of fluoranthene in water samples with a molecular beacon. J Environ Sci (China) 2010; 22:796-800. [PMID: 20608519 DOI: 10.1016/s1001-0742(09)60179-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A reliable and sensitive competitive real-time fluorescent quantitative immuno-PCR (RTFQ-IPCR) assay using a molecular beacon was developed for the determination of trace fluoranthene (FL) in the environment. Under optimized assay conditions, FL can be determined in the concentration range from 1 fg/mL to 100 ng/mL, withy = 0.194x + 7.859, and a correlation coefficient of 0.967 was identified, with a detection limit of 0.6 fg/mL. Environmental water samples were successfully analyzed, recovery was between 90% and 116%, with intra-day relative standard deviation (RSD) of 6.7%-12.8% and inter-day RSD of 8.4%-15.2%. The results obtained from RTFQ-IPCR were confirmed by ELISA, showing good accuracy and suitability to analyze FL in field samples. As a highly sensitive method, the molecular beacon-based RTFQ-IPCR is acceptable and promising for providing reliable test results to make environmental decisions.
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Affiliation(s)
- Qiyan Ye
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
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59
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Zhuang H, Ye Q, Chen H. Detection of PCB77 by Antibody-Coated Competitive Fluorescent Quantitative Immuno-PCR Using Molecular Beacon. ANAL LETT 2009. [DOI: 10.1080/00032710903201891] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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60
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Ye QY, Zhuang HS, Zhou C. Detection of trace anthracene in soil samples with real-time fluorescence quantitative immuno-PCR using a molecular beacon probe. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2009; 28:386-391. [PMID: 21784031 DOI: 10.1016/j.etap.2009.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2009] [Revised: 06/09/2009] [Accepted: 06/13/2009] [Indexed: 05/31/2023]
Abstract
We developed a highly sensitive and robust real-time fluorescence quantitative immuno-PCR (RTFQ-IPCR) method which uses molecular beacon (MB) probe to detect trace anthracene in the environment. This method was performed on serial dilutions of known anthracene concentrations equivalent to 10-fold dilutions of 10fg/mL to 100pg/mL. We obtained a linear relationship between 10fg/mL and 100pg/mL, with y=0.684x+13.221. A correlation coefficient of 0.994 was also identified, with a detection limit of 4.5fg/mL. After investigating the presence of anthracene in soil samples via RTFQ-IPCR, the obtained concentrations were confirmed by ELISA to be correct and believable, with the recovery ratio ranging from 82% to 112.5%. Based on its sensitivity and reproducibility, MB-based RTFQ-IPCR was found to be acceptable for use in on-site field tests to provide rapid, quantitative, and reliable test results for making environmental decisions.
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Affiliation(s)
- Qi-Yan Ye
- College of Environmental Science and Engineering, Donghua University, 2999 North Renming Road, Songjiang, Shanghai 201620, China
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61
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Hoffmann B, Beer M, Reid SM, Mertens P, Oura CAL, van Rijn PA, Slomka MJ, Banks J, Brown IH, Alexander DJ, King DP. A review of RT-PCR technologies used in veterinary virology and disease control: sensitive and specific diagnosis of five livestock diseases notifiable to the World Organisation for Animal Health. Vet Microbiol 2009; 139:1-23. [PMID: 19497689 DOI: 10.1016/j.vetmic.2009.04.034] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Revised: 04/15/2009] [Accepted: 04/28/2009] [Indexed: 12/31/2022]
Abstract
Real-time, reverse transcription polymerase chain reaction (rRT-PCR) has become one of the most widely used methods in the field of molecular diagnostics and research. The potential of this format to provide sensitive, specific and swift detection and quantification of viral RNAs has made it an indispensable tool for state-of-the-art diagnostics of important human and animal viral pathogens. Integration of these assays into automated liquid handling platforms for nucleic acid extraction increases the rate and standardisation of sample throughput and decreases the potential for cross-contamination. The reliability of these assays can be further enhanced by using internal controls to validate test results. Based on these advantageous characteristics, numerous robust rRT-PCRs systems have been developed and validated for important epizootic diseases of livestock. Here, we review the rRT-PCR assays that have been developed for the detection of five RNA viruses that cause diseases that are notifiable to the World Organisation for Animal Health (OIE), namely: foot-and-mouth disease, classical swine fever, bluetongue disease, avian influenza and Newcastle disease. The performance of these tests for viral diagnostics and disease control and prospects for improved strategies in the future are discussed.
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Affiliation(s)
- Bernd Hoffmann
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
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Hofmann MA, Renzullo S, Mader M, Chaignat V, Worwa G, Thuer B. Genetic characterization of toggenburg orbivirus, a new bluetongue virus, from goats, Switzerland. Emerg Infect Dis 2009; 14:1855-61. [PMID: 19046507 PMCID: PMC2634640 DOI: 10.3201/eid1412.080818] [Citation(s) in RCA: 228] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Nucleotide sequences analysis indicates that this virus is a new serotype of bluetongue virus. A novel bluetongue virus (BTV) termed Toggenburg orbivirus (TOV) was detected in goats from Switzerland by using real-time reverse transcription–PCR. cDNA corresponding to the complete sequence of 7 of 10 double-stranded RNA segments of the viral genome was amplified by PCR and cloned into a plasmid vector. Five clones for each genome segment were sequenced to determine a consensus sequence. BLAST analysis and dendrogram construction showed that TOV is closely related to BTV, although some genome segments are distinct from the 24 known BTV serotypes. Maximal sequence identity to any BTV ranged from 63% (segment 2) to 79% (segments 7 and 10). Because the gene encoding outer capsid protein 2 (VP2), which determines the serotype of BTV, is placed within the BTV serogroup, we propose that TOV represents an unknown 25th serotype of BTV.
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Affiliation(s)
- Martin A Hofmann
- Institute of Virology and Immunoprophylaxis, Mittelhaeusern, Switzerland.
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63
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Yang R, Jin J, Long L, Wang Y, Wang H, Tan W. Reversible molecular switching of molecular beacon: controlling DNA hybridization kinetics and thermodynamics using mercury(ii) ions. Chem Commun (Camb) 2009:322-4. [DOI: 10.1039/b816638b] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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64
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Ye Q, Zhuang H, Zhou C. Detection of naphthalene by real-time immuno-PCR using molecular beacon. Mol Cell Probes 2008; 23:29-34. [PMID: 19028563 DOI: 10.1016/j.mcp.2008.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2008] [Revised: 10/22/2008] [Accepted: 10/22/2008] [Indexed: 10/21/2022]
Abstract
A rapid and quantitative technique is urgently needed in detecting toxicological and carcinogenic polycyclic aromatic hydrocarbons (PAHs) in the environment. Using a molecular beacon (MB), this study aimed at detecting the presence of naphthalene through an assay developed via a highly sensitive and robust, real-time fluorescent quantitative immuno-PCR (FQ-IPCR), which was then performed on serial dilutions of known naphthalene concentrations equivalent to 10-fold dilutions of 1-10(4) fg/mL. A correlation coefficient of 0.996 was identified, and a linear relationship between 1 fg/mL and 10 pg/mL, with y = 1.392x + 11.188, was obtained. A trace amount (1 fg/mL) of naphthalene congeners could be detected using this method. Five water samples were then used for validation, the results of which were further confirmed through a conventional enzyme-linked immuno sorbent assay (ELISA). Based on sensitivity and reproduction, the MB-based FQ-IPCR technique is a promising tool for monitoring environmental endocrine disruptors.
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Affiliation(s)
- Qiyan Ye
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
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65
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Rodrguez-Snchez B, Iglesias-Martn I, Martnez-Avils M, Snchez-Vizcano JM. Orbiviruses in the Mediterranean Basin: Updated Epidemiological Situation of Bluetongue and New Methods for the Detection of BTV Serotype 4. Transbound Emerg Dis 2008; 55:205-14. [DOI: 10.1111/j.1865-1682.2008.01029.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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66
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Yang R, Jin J, Chen Y, Shao N, Kang H, Xiao Z, Tang Z, Wu Y, Zhu Z, Tan W. Carbon Nanotube-Quenched Fluorescent Oligonucleotides: Probes that Fluoresce upon Hybridization. J Am Chem Soc 2008; 130:8351-8. [DOI: 10.1021/ja800604z] [Citation(s) in RCA: 501] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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67
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A pair of novel primers for universal detection of the NS1 gene from various bluetongue virus serotypes. Virol Sin 2008. [DOI: 10.1007/s12250-008-2901-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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68
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Diagnostic evaluation of multiplexed reverse transcription-PCR microsphere array assay for detection of foot-and-mouth and look-alike disease viruses. J Clin Microbiol 2008; 46:1081-9. [PMID: 18216216 DOI: 10.1128/jcm.01740-07] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A high-throughput multiplexed assay was developed for the differential laboratory detection of foot-and-mouth disease virus (FMDV) from viruses that cause clinically similar diseases of livestock. This assay simultaneously screens for five RNA and two DNA viruses by using multiplexed reverse transcription-PCR (mRT-PCR) amplification coupled with a microsphere hybridization array and flow-cytometric detection. Two of the 17 primer-probe sets included in this multiplex assay were adopted from previously characterized real-time RT-PCR (rRT-PCR) assays for FMDV. The diagnostic accuracy of the mRT-PCR assay was evaluated using 287 field samples, including 247 samples (213 true-positive samples and 35 true-negative samples) from suspected cases of foot-and-mouth disease collected from 65 countries between 1965 and 2006 and 39 true-negative samples collected from healthy animals. The mRT-PCR assay results were compared to those of two singleplex rRT-PCR assays, using virus isolation with antigen enzyme-linked immunosorbent assays as the reference method. The diagnostic sensitivity of the mRT-PCR assay for FMDV was 93.9% (95% confidence interval [CI], 89.8 to 96.4%), and the sensitivity was 98.1% (95% CI, 95.3 to 99.3%) for the two singleplex rRT-PCR assays used in combination. In addition, the assay could reliably differentiate between FMDV and other vesicular viruses, such as swine vesicular disease virus and vesicular exanthema of swine virus. Interestingly, the mRT-PCR detected parapoxvirus (n = 2) and bovine viral diarrhea virus (n = 2) in clinical samples, demonstrating the screening potential of this mRT-PCR assay to identify viruses in FMDV-negative material not previously recognized by using focused single-target rRT-PCR assays.
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69
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Opinion of the Scientific Panel on Animal Health an Welfare (AHAW) on the EFSA Selfmandate on bluetongue origin and occurrence. EFSA J 2007. [DOI: 10.2903/j.efsa.2007.480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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70
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Opinion of the Scientific Panel on Animal Health and Welfare (AHAW) on request from the Commission on bluetongue vectors and vaccines. EFSA J 2007. [DOI: 10.2903/j.efsa.2007.479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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