Abstract
Cocal virus (COCV) is one of the causative agents of vesicular stomatitis, presenting clinical signs indistinguishable from those caused by foot-and-mouth disease virus (FMDV). Therefore, the differentiation of these two viruses via laboratory diagnosis is essential. The objective of this study was to develop and validate a real-time quantitative PCR (RT-qPCR) protocol for the diagnosis of COCV directly from epithelial samples. The method developed had 97% accuracy at 3950 pfu and a repeatability error of 1.29%. RT-qPCR was able to distinguish COCV from other viruses that cause vesicular diseases, an important factor because seroneutralization may produce cross-reactivity between COCV and vesicular stomatitis Alagoas virus (VSAV). No epithelial sample originating from vesicular disease outbreaks between 2014 and 2018 in Brazil was positive for COCV.
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Acknowledgements
This work was supported by Ministério da Agricultura Pecuária e Abastecimento (MAPA), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brazil (CAPES), and Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG—Grant No. APQ-03403-18). JKPR is CNPq fellowship recipient.
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Lázaro Sales, M., Dall’Agnol, M., de Oliveira, A.M. et al. RT-qPCR for the diagnosis of the vesiculovirus Cocal virus. Arch Virol 165, 1843–1847 (2020). https://doi.org/10.1007/s00705-020-04668-6
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DOI: https://doi.org/10.1007/s00705-020-04668-6