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Transmission of foot-and-mouth disease SAT2 viruses at the wildlife–livestock interface of two major transfrontier conservation areas in southern Africa

Brito Barbara P., Jori Ferran, Dwarka Rahana, Maree François F., Heath Livio, Perez Andres M.. 2016. Transmission of foot-and-mouth disease SAT2 viruses at the wildlife–livestock interface of two major transfrontier conservation areas in southern Africa. Frontiers in Microbiology, 7 (528), 10 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Quartile : Q1, Sujet : MICROBIOLOGY

Abstract : Over a decade ago, foot-and-mouth disease (FMD) re-emerged in Southern Africa specifically in beef exporting countries that had successfully maintained disease-free areas in the past. FMD virus (FMDV) serotype SAT2 has been responsible for a majority of these outbreaks. Epidemiological studies have revealed the importance of the African buffalo as the major wildlife FMD reservoir in the region. We used phylogeographic analysis to study dynamics of FMD transmission between buffalo and domestic cattle at the interface of the major wildlife protected areas in the region currently encompassing two largest Transfrontier conservation areas: Kavango–Zambezi (KAZA) and Great Limpopo (GL). Results of this study showed restricted local occurrence of each FMDV SAT2 topotypes I, II, and III, with occasional virus migration from KAZA to GL. Origins of outbreaks in livestock are frequently attributed to wild buffalo, but our results suggest that transmission from cattle to buffalo also occurs. We used coalescent Bayesian skyline analysis to study the genetic variation of the virus in cattle and buffalo, and discussed the association of these genetic changes in the virus and relevant epidemiological events that occurred in this area. Our results show that the genetic diversity of FMDV SAT2 has decreased in buffalo and cattle population during the last decade. This study contributes to understand the major dynamics of transmission and genetic variation of FMDV SAT2 in Southern Africa, which will could ultimately help in designing efficient strategies for the control of FMD at a local and regional level. (Résumé d'auteur)

Mots-clés Agrovoc : Fièvre aphteuse, Animal sauvage, Animal domestique, Transmission des maladies, Épidémiologie, Biologie moléculaire, Distribution géographique, Interactions biologiques, Zone protegée, Buffle africain, Bétail

Mots-clés géographiques Agrovoc : Afrique australe, Zimbabwe, Afrique du Sud

Mots-clés libres : Foot and mouth disease, SAT2, Molecular epidemiology, Phylogeography, Southern Africa

Classification Agris : L73 - Animal diseases
P01 - Nature conservation and land resources

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

  • Brito Barbara P., Universidad de Chile (CHL)
  • Jori Ferran, CIRAD-ES-UPR AGIRs (BWA) ORCID: 0000-0001-5451-7767
  • Dwarka Rahana, ARC (ZAF)
  • Maree François F., University of Pretoria (ZAF)
  • Heath Livio, ARC (ZAF)
  • Perez Andres M., University of Minnesota (USA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580409/)

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