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Villabona-Arenas C. J., Ayouba Ahidjo, Esteban Amandine, D'Arc M., Ngole E. M., Peeters Martine. (2018). Noninvasive western lowland gorilla's health monitoring : a decade of simian immunodeficiency virus surveillance in southern Cameroon. Ecology and Evolution, 8 (22), 10698-10710. ISSN 2045-7758

Fichier PDF disponiblehttp://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-12/010074512.pdf[ PDF Link ]

Lien direct chez l'éditeur doi:10.1002/ece3.4478

Titre
Noninvasive western lowland gorilla's health monitoring : a decade of simian immunodeficiency virus surveillance in southern Cameroon
Année de publication2018
Type de documentArticle référencé dans le Web of Science WOS:000451611000006
AuteursVillabona-Arenas C. J., Ayouba Ahidjo, Esteban Amandine, D'Arc M., Ngole E. M., Peeters Martine.
SourceEcology and Evolution, 2018, 8 (22), p. 10698-10710. ISSN 2045-7758
RésuméSimian immunodeficiency virus (SIVgor) causes persistent infection in critically endangered western lowland gorillas (Gorilla gorilla gorilla) from west central Africa. SIVgor is closely related to chimpanzee and human immunodeficiency viruses (SIVcpz and HIV-1, respectively). We established a noninvasive method that does not interfere with gorillas' natural behaviour to provide wildlife pathogen surveillance and health monitoring for conservation. A total of 1,665 geo-referenced fecal samples were collected at regular intervals from February 2006 to December 2014 (123 sampling days) in the Campo-Ma'an National Park (southwest Cameroon). Host genotyping was performed using microsatellite markers, SIVgor infection was identified by serology and genetic amplification was attempted on seropositive individuals. We identified at least 125 distinct gorillas, 50 were resampled (observed 3.5 times in average) and 38 were SIVgor+ (seven individuals were seroconverters). Six groups of gorillas were identified based on the overlapping occurrence of individuals with apparent high rates of gene flow. We obtained SIVgor genetic sequences from 25 of 38 seropositive genotyped gorillas and showed that the virus follows exponential growth dynamics under a strict molecular clock. Different groups shared SIVgor lineages demonstrating intergroup viral spread and recapture of positive individuals illustrated intra-host viral evolution. Relatedness and relationship genetic analysis of gorillas together with Bayesian phylogenetic inference of SIVgor provided evidence suggestive of vertical transmission. In conclusion, we provided insights into gorilla social dynamics and SIVgor evolution and emphasized the utility of noninvasive sampling to study wildlife health populations. These findings contribute to prospective planning for better monitoring and conservation.
Plan de classementEntomologie médicale / Parasitologie / Virologie [052] ; Sciences du monde animal [080] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
Descr. géo.CAMEROUN
LocalisationFonds IRD [F B010074512]
Identifiant IRDfdi:010074512
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010074512

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