Browsing Research Articles (University of Pretoria) by Author "Gaidet, Nicolas"

Browsing Research Articles (University of Pretoria) by Author "Gaidet, Nicolas"

Sort by: Order: Results:

  • Bridge hosts for avian influenza viruses at the wildlife/domestic interface : an eco-epidemiological framework implemented in southern Africa 
    Caron, Alexandre; Grosbois, Vladimir; Etter, Eric M.C.; Gaidet, Nicolas; De Garine-Wichatitsky, Michel (Elsevier, 2014-12)
    Wild terrestrial birds can act as potential local spreaders or bridge hosts for avian influenzaviruses (AIVs) between waterfowl (the maintenance hosts of AIVs) and domestic avianpopulations in which AIVs may cause disease. ...
  • Bridge hosts, a missing link for disease ecology in multi-host systems 
    Caron, Alexandre; Cappelle, Julien; Cumming, Graeme S.; De Garine-Wichatitsky, Michel; Gaidet, Nicolas (BioMed Central, 2015-07)
    In ecology, the grouping of species into functional groups has played a valuable role in simplifying ecological complexity. In epidemiology, further clarifications of epidemiological functions are needed: while host roles ...
  • Disentangling the role of Africa in the global spread of H5 highly pathogenic avian influenza 
    Fusaro, Alice; Zecchin, Bianca; Vrancken, Bram; Abolnik, Celia; Ademun, Rose; Alassane, Abdou; Arafa, Abdelsatar; Awuni, Joseph Adongo; Couacy-Hymann, Emmanuel; Coulibaly, M.’ Betiegue; Gaidet, Nicolas; Go-Mar, Emilie; Joannis, Tony; Jumbo, Simon Dickmu; Minoungou, Germaine; Meseko, Clement; Souley, Maman Moutari; Ndumu, Deo Birungi; Shittu, Ismaila; Twabela, Augustin; Wade, Abel; Wiersma, Lidewij; Akpeli, Yao P.; Zamperin, Gianpiero; Milani, Adelaide; Lemey, Philippe; Monne, Isabella (Nature Publishing Group, 2019-11-22)
    The role of Africa in the dynamics of the global spread of a zoonotic and economicallyimportant virus, such as the highly pathogenic avian influenza (HPAI) H5Nx of the Gs/GD lineage, remains unexplored. Here we characterise ...
  • Empirical analysis suggests continuous and homogeneous circulation of Newcastle disease virus in a wide range of wild bird species in Africa 
    Cappelle, Julien; Caron, Alexandre; De Almeida, Renata Servan; Gil, Patricia; Pedrono, M.; Mundava, Josphine; Fofana, Bouba; Balanca, Gilles; Dakouo, Marthin; Ould El Mamy, Ahmed B.; Abolnik, Celia; Maminiaina, Olivier Fridolin; Cumming, Graeme S.; De Visscher, M.N.; Albina, Emmanuel; Chevalier, Veronique; Gaidet, Nicolas (Cambridge University Press, 2015-04)
    Newcastle disease (ND) is one of the most important poultry diseases worldwide and can lead to annual losses of up to 80% of backyard chickens in Africa. All bird species are considered susceptible to ND virus (NDV) ...
  • Estimating dynamic risk ractors for pathogen transmission using community-level bird census data at the wildlife/domestic interface 
    Caron, Alexandre; De Garine-Wichatitsky, Michel; Gaidet, Nicolas; Chiweshe, Ngoni; Cumming, Graeme S. (Resilience Alliance Publications, 2010-09)
    The ecology of host species is crucial for understanding the mechanisms of pathogen transmission and spread in complex multi-host systems. In this article, we use detailed observations of the host community to develop and ...
  • Factors influencing long-term and seasonal waterbird abundance and composition at two adjacent lakes in Zimbabwe 
    Mundava, Josphine; Caron, Alexandre; Gaidet, Nicolas; Couto, Fernando M.; Couto, Jennifer T.; De Garine-Wichatitsky, Michel; Mundy, Peter J. (Taylor & Francis, 2012-08)
    The spatial and temporal structures of waterbird communities are dynamic and complex with many driving factors. We used long-term waterbird census data at two lakes in Zimbabwe to explore the ecological and anthropogenic drivers ...
  • Investigating avian influenza infection hotspots in old-world shorebirds 
    Gaidet, Nicolas; Ould El Mamy, Ahmed B.; Cappelle, Julien; Caron, Alexandre; Cumming, Graeme S.; 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; Balanca, Gilles (Public Library of Science, 2012-09-28)
    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 ...
  • New avian paramyxoviruses Type I strains identified in Africa provide new outcomes for phylogeny reconstruction and genotype classification 
    De Almeida, Renata Servan; Hammoumi, Saliha; Gil, Patricia; Briand, Francois-Xavier; Molia, Sophie; Gaidet, Nicolas; Cappelle, Julien; Chevalier, Veronique; Balanca, Gilles; Traore, Abdallah; Grillet, Colette; Maminiaina, Olivier Fridolin; Guendouz, Samia; Dakouo, Marthin; Samake, Kassim; Bezeid, Ould El Mamy; Diarra, Abbas; Chaka, Hassen; Goutard, Flavie; Thompson, P.N. (Peter N.); Martinez, Dominique; Jestin, Veronique; Albina, Emmanuel (Public Library of Science, 2013-10-18)
    Newcastle disease (ND) is one of the most lethal diseases of poultry worldwide. It is caused by an avian paramyxovirus 1 that has high genomic diversity. In the framework of an international surveillance program launched ...
  • Persistence of low pathogenic avian Influenza virus in waterfowl in a southern African ecosystem 
    Caron, Alexandre; Abolnik, Celia; Mundava, Josphine; Gaidet, Nicolas; Burger, Christina E.; Mochotlhoane, Bontsi; Bruinzeel, Leo; Chiweshe, Ngoni; De Garine-Wichatitsky, Michel; Cumming, Graeme S. (Springer, 2011-03)
    Waterfowl were counted and sampled in a Zimbabwean wetland over 24 months. LPAI strains were detected during 20 consecutive months, providing the first evidence of regional yearly persistence of LPAI. We discuss the role ...
  • A social–ecological approach to landscape epidemiology : geographic variation and avian influenza 
    Cumming, Graeme S.; Abolnik, Celia; Caron, Alexandre; Gaidet, Nicolas; Grewar, John Duncan; Hellard, Eleonore; Henry, Dominic A. W.; Reynolds, Chevonne (Springer, 2015-07)
    Context Landscape structure influences host–parasite–pathogen dynamics at multiple scales in space and time. Landscape epidemiology, which connects disease ecol-ogy and landscape ecology, is still an emerging field. ...