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El Daous H, Mitoma S, Elhanafy E, Thi Nguyen H, Thi Mai N, Hara A, Duangtathip K, Takezaki Y, Kaneko C, Norimine J, Sekiguchi S. Establishment of a novel diagnostic test for Bovine leukaemia virus infection using direct filter PCR. Transbound Emerg Dis 2020; 67:1671-1676. [PMID: 32034996 DOI: 10.1111/tbed.13506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 01/09/2020] [Accepted: 02/03/2020] [Indexed: 12/22/2022]
Abstract
Enzootic bovine leucosis (EBL) is a neoplastic disease of cattle caused by Bovine leukaemia virus (BLV). EBL causes great economic losses, so a fast and reliable diagnostic method is critical for understanding the status of BLV. This will allow us to control BLV infections efficiently and mitigate economic losses. In this study, we established a direct diagnostic test for BLV using dried blood-spotted filter papers without sample pre-treatment. The study was based on 159 clinical blood specimens collected in EDTA from one farm in Kyushu, Japan. The blood-spotted filter papers were used as the template for direct filter PCR. When an ELISA was used as the diagnostic gold standard, the sensitivity and specificity of the direct filter PCR were 90.1% and 97.5%, respectively. The kappa value for the direct filter PCR and real-time PCR methods was 0.97. The dried blood samples spotted onto filter papers were stable for at least 10 days at room temperature, even when the samples were from cattle with a low BLV proviral load. Direct filter PCR is a rapid, easy, reliable and cost-effective diagnostic test that directly detects the BLV proviral genome in clinical blood specimens without DNA extraction. Moreover, it simplifies the collection, transportation and storage procedures for clinical blood specimens.
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Affiliation(s)
- Hala El Daous
- Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, Japan.,Faculty of Veterinary Medicine, Benha University, Toukh, Egypt
| | - Shuya Mitoma
- Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, Japan
| | - Eslam Elhanafy
- Faculty of Veterinary Medicine, Benha University, Toukh, Egypt.,Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
| | | | - Ngan Thi Mai
- Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, Japan.,Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Akihiro Hara
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Karn Duangtathip
- Kasetsart University Veterinary Teaching Hospital Hua-Hin, Prachuap Khiri Khan, Thailand
| | - Yuka Takezaki
- Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, Japan
| | - Chiho Kaneko
- Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan
| | - Junzo Norimine
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan.,Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan
| | - Satoshi Sekiguchi
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan.,Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan
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