Senecavirus A seroprevalence and risk factors in United States pig farms

Guilherme Preis, Juan M. Sanhueza, Carles Vilalta, Fabio A. Vannucci, Marie R. Culhane, Cesar A. Corzo

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Senecavirus A (SVA) is a non-enveloped, single-stranded, positive-sense RNA virus belonging to the Picornaviridae family. Senecavirus A is constantly associated with outbreaks of vesicular disease in pigs and has been reported in several countries since its first large-scale outbreak in 2014. Senecavirus A's clinical disease and lesions are indistinguishable from other vesicular foreign animal diseases (FAD). Therefore, an FAD investigation needs to be conducted for every SVA case. For this reason, SVA has been attributed as the cause of an alarming increase in the number of yearly FAD investigations performed by the United States Department of Agriculture (USDA). The objectives of this study were to estimate the seroprevalence of SVA antibodies in breeding and growing pig farms in the United States and to determine the farm-level risk factors associated with seropositivity. A total of 5,794 blood samples were collected from 98 and 95 breeding and growing pig farms in 17 states. A farm characteristics questionnaire was sent to all farms, to which 80% responded. The responses were used to conduct logistic regression analyses to assess the risk factors associated with SVA seropositivity. The estimated farm-level seroprevalences were 17.3% and 7.4% in breeding and growing pig farms, respectively. Breeding farms had 2.64 times higher odds of SVA seropositivity than growing pig farms. One key risk factor identified in breeding farms was the practice of rendering dead animal carcasses. However, the adoption of a higher number of farm biosecurity measures was associated with a protective effect against SVA seropositivity in breeding farms.

Original languageEnglish (US)
Article number1011975
JournalFrontiers in Veterinary Science
StatePublished - Oct 20 2022

Bibliographical note

Funding Information:
This research was funded by the National Pork Board (NPB#18-041).

Publisher Copyright:
Copyright © 2022 Preis, Sanhueza, Vilalta, Vannucci, Culhane and Corzo.


  • risk factors
  • senecavirus A
  • seroprevalence
  • swine
  • vesicular disease

PubMed: MeSH publication types

  • Journal Article


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