Investigating avian influenza infection hotspots in old-world shorebirds

Gaidet Nicolas, Ould El Mamy Ahmed Bezeid, Cappelle Julien, Caron Alexandre, Cumming Graeme S., Grosbois Vladimir, Gil Patricia, Hammoumi Saliha, Servan de Almeida Renata, Fereidouni Sasan R., Cattoli Giovanni, Abolnik Célia, Mundava Josephine, Fofana Bouba, Ndlovu Mduduzi, Diawara Yelli, Hurtado Renata, Dodman Tim, Balança Gilles. 2012. Investigating avian influenza infection hotspots in old-world shorebirds. PloS One, 7 (9):e46049, 12 p.

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Abstract : Heterogeneity in the transmission rates of pathogens across hosts or environments may produce disease hotspots, which are defined as specific sites, times or species associations in which the infection rate is consistently elevated. Hotspots for avian influenza virus (AIV) in wild birds are largely unstudied and poorly understood. A striking feature is the existence of a unique but consistent AIV hotspot in shorebirds (Charadriiformes) associated with a single species at a specific location and time (ruddy turnstone Arenaria interpres at Delaware Bay, USA, in May). This unique case, though a valuable reference, limits our capacity to explore and understand the general properties of AIV hotspots in shorebirds. Unfortunately, relatively few shorebirds have been sampled outside Delaware Bay and they belong to only a few shorebird families; there also has been a lack of consistent oropharyngeal sampling as a complement to cloacal sampling. In this study we looked for AIV hotspots associated with other shorebird species and/or with some of the larger congregation sites of shorebirds in the old world. We assembled and analysed a regionally extensive dataset of AIV prevalence from 69 shorebird species sampled in 25 countries across Africa and Western Eurasia. Despite this diverse and extensive coverage we did not detect any new shorebird AIV hotspots. Neither large shorebird congregation sites nor the ruddy turnstone were consistently associated with AIV hotspots. We did, however, find a low but widespread circulation of AIV in shorebirds that contrast with the absence of AIV previously reported in shorebirds in Europe. A very high AIV antibody prevalence coupled to a low infection rate was found in both first-year and adult birds of two migratory sandpiper species, suggesting the potential existence of an AIV hotspot along their migratory flyway that is yet to be discovered. (Résumé d'auteur)

Mots-clés Agrovoc : Influenzavirus aviaire, Oiseau aquatique, Animal sauvage, Hôte, Identification, Vecteur de maladie, Migration animale, Enquête

Mots-clés géographiques Agrovoc : Eurasie, Afrique

Classification Agris : L72 - Pests of animals
L73 - Animal diseases

Champ stratégique Cirad : Axe 4 (2005-2013) - Santé animale et maladies émergentes

Auteurs et affiliations

  • Gaidet Nicolas, CIRAD-ES-UPR AGIRs (FRA)
  • Ould El Mamy Ahmed Bezeid, CNERV (MRT)
  • Cappelle Julien, CIRAD-ES-UPR AGIRs (FRA) ORCID: 0000-0001-7668-1971
  • Caron Alexandre, CIRAD-ES-UPR AGIRs (ZWE) ORCID: 0000-0002-5213-3273
  • Cumming Graeme S., UCT (ZAF)
  • Grosbois Vladimir, CIRAD-ES-UPR AGIRs (FRA)
  • Gil Patricia, CIRAD-BIOS-UMR CMAEE (FRA)
  • Hammoumi Saliha
  • Servan de Almeida Renata, CIRAD-BIOS-UMR CMAEE (FRA)
  • Fereidouni Sasan R., FLI (DEU)
  • Cattoli Giovanni, Istituto zooprofilattico sperimentale delle Venezie (ITA)
  • Abolnik Célia, OVI (ZAF)
  • Mundava Josephine, National University of Science and Technology (ZWE)
  • Fofana Bouba, Ministère des eaux et forêts (Mali) (MLI)
  • Ndlovu Mduduzi, UCT (ZAF)
  • Diawara Yelli, Parc national du Banc d'Arguin (MRT)
  • Hurtado Renata, Universidade de São Paulo (BRA)
  • Dodman Tim, Wetlands International (NLD)
  • Balança Gilles, CIRAD-ES-UPR AGIRs (FRA)

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