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The third wave of Seneca Valley virus outbreaks in pig herds in southern Brazil

  • Veterinary Microbiology - Research Paper
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Seneca Valley virus (SVV) is the only representative member of the Senecavirus genus of the Picornaviridae family. Since 2014, SVV has been identified as a causative agent of vesicular disease outbreaks in pigs of different ages from Brazil, the USA, Canada, China, Thailand, Colombia, Vietnam, and India. From May 2020, several pig herds, from the Brazilian states Parana and Santa Catarina reported vesicular disease in different pig categories. This study aimed to report the third wave of SVV outbreaks in pig herds in southern Brazil. A total of 263 biological samples from 150 pigs in 18 pig herds were evaluated. The samples were obtained from pigs with clinical signs of vesicular disease (n = 242) and asymptomatic animals (n = 21). Seneca Valley virus RNA was detected in 96 (36.5%) of the biological samples evaluated, with 89 samples from symptomatic and 7 from asymptomatic pigs. The data show that asymptomatic pigs, but in viremia, are possible sources of infection and can act as carriers and possibly spreaders of SVV to the herd. In this study, we report the third wave of vesicular disease outbreaks caused by SVV in different categories of pigs from herds located in southern Brazil.

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Data availability

Sequences determined in this study were submitted to GenBank database under the accession numbers MZ032150-MZ032153.


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The authors thank the following Brazilian Institutes for their financial support: the National Council of Technological and Scientific Development (CNPq); the Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES); the Financing of Studies and Projects (FINEP); and the Araucaria Foundation (FAP/PR). AAA and AFA are recipients of CNPq Fellowships. AMD is a recipient of the INCT-Leite/CAPES fellowship (grant number 88887.495081/2020–00). CYY is a recipient of the Araucaria Foundation (FAP/PR) fellowship.

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Authors and Affiliations



Conceptualization and design: AMD and AAA; Methodology, MVV, CYY and AMD; Writing—original draft preparation, MVV and AMD; Writing—review & editing: RAL, AFA and AAA. All authors have read and agreed to the published version of the manuscript.

Corresponding author

Correspondence to Amauri A. Alfieri.

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Ethics approval and consent to participate

This study was approved by the Ethics Committee on the Use of Animals in Teaching and Research of the Universidade Estadual de Londrina (UEL), Londrina, Brazil, under number 11363.2015.16. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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The authors declare no competing interests.

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Communicated by Fernando R. Spilki.

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Vieira, M.V., Yasumitsu, C.Y., Dall Agnol, A.M. et al. The third wave of Seneca Valley virus outbreaks in pig herds in southern Brazil. Braz J Microbiol 53, 1701–1706 (2022).

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