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Dowgier G, Mari V, Losurdo M, Larocca V, Colaianni ML, Cirone F, Lucente MS, Martella V, Buonavoglia C, Decaro N. A duplex real-time PCR assay based on TaqMan technology for simultaneous detection and differentiation of canine adenovirus types 1 and 2. J Virol Methods 2016; 234:1-6. [PMID: 27040113 DOI: 10.1016/j.jviromet.2016.03.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/21/2016] [Accepted: 03/24/2016] [Indexed: 11/25/2022]
Abstract
Canine adenoviruses are a major cause of disease in dogs, coyotes, red foxes and wolves, as well as in other carnivores and marine mammals. Canine adenovirus type 1 (CAdV-1) and canine adenovirus type 2 (CAdV-2) cause infectious canine hepatitis (ICH) and infectious tracheobronchitis (ITB), respectively. In this study, a duplex real-time PCR assay for simultaneous detection and characterisation of CAdV-1 and CAdV-2 was developed by using a single primer pair and virus-specific probes. The assay was validated testing standard DNAs produced on purpose and clinical samples of various matrices known to be positive for CAdV-1, CAdV-2 or both viruses. Precise calculation of DNA loads in samples containing a wide range of viral amounts was allowed by generating a standard curve for absolute quantification. The assay was proven to be highly specific, since no cross-reactions with the different CAdV type was observed, and sensitive, being able to detect less than 10 copies of CAdV-1/CAdV-2 DNA. The low intra-assay and interassay coefficient of variations demonstrated a high repeatability, thus confirming the potential use of this assay for quantitative detection of CAdV-1 and CAdV-2 for rapid diagnosis and epidemiological investigations.
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Affiliation(s)
- Giulia Dowgier
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Viviana Mari
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Michele Losurdo
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Vittorio Larocca
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, via Manfredonia 20, 71100 Foggia, Italy
| | - Maria Loredana Colaianni
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, via Manfredonia 20, 71100 Foggia, Italy
| | - Francesco Cirone
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Maria Stella Lucente
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Vito Martella
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Canio Buonavoglia
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy; Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, via Manfredonia 20, 71100 Foggia, Italy
| | - Nicola Decaro
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy.
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