Investigating avian influenza infection hotspots in old-world shorebirds

Gaidet, Nicolas, Ould El Mamy, Ahmed B., Cappelle, Julien, Caron, Alexandre, Cumming, Graeme, Grosbois, Vladimir, Gil, Patricia, Hammoumi, Saliha, de Almeida, Renata Servan, Fereidouni, Sasan R., Cattoli, Giovanni, Abolnik, Celia, Mundava, Josphine, Fofana, Bouba, Ndlovu, Mduduzi, Diawara, Yelli, Hurtado, Renata, Newman, Scott H., Dodman, Tim, and Balança, Gilles (2012) Investigating avian influenza infection hotspots in old-world shorebirds. PLoS ONE, 7 (9). pp. 1-12.

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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.

Item ID: 40960
Item Type: Article (Refereed Research - C1)
Additional Information:

© Gaidet et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

ISSN: 1932-6203
Funders: French Ministry of Research (FMR), Technical Cooperation Programme of the Food and Agricultural Organization of the United Nations (UN-FAO)
Projects and Grants: Global Avian Influenza network for Surveillance (GRIPAVI) project
Date Deposited: 18 Nov 2015 02:07
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050104 Landscape Ecology @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070704 Veterinary Epidemiology @ 50%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960501 Ecosystem Assessment and Management at Regional or Larger Scales @ 50%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 50%
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