Experimental infection of pregnant pyrenean chamois (rupicapra pyrenaica) with border disease virus subtype 4
Martin, Claire (Laboratoire de Sophia-Antipolis. Unité Pathologie des Ruminants)
Duquesne, Véronique (Laboratoire de Sophia-Antipolis. Unité Pathologie des Ruminants)
Guibert, Jean-Michel (Laboratoire de Sophia-Antipolis. Unité Pathologie des Ruminants)
Pulido, Coralie (Laboratoire de Sophia-Antipolis. Unité Pathologie des Ruminants)
Gilot-Fromont, Emmanuelle (Université de Lyon. Université Lyon. Laboratoire de Biométrie et Biologie Evolutive)
Gibert, Philippe (Office National de la Chasse et de la Faune Sauvage)
Velarde, Roser (Universitat Autònoma de Barcelona. Servei d'Ecopatologia de Fauna Salvatge)
Thiéry, Richard (Laboratoire de Sophia-Antipolis. Unité Pathologie des Ruminants)
Marco, Ignasi (Universitat Autònoma de Barcelona. Servei d'Ecopatologia de Fauna Salvatge)
Dubois, Eric (Laboratoire de Sophia-Antipolis. Unité Pathologie des Ruminants)
Duquesne, Véronique (Laboratoire de Sophia-Antipolis. Unité Pathologie des Ruminants)

Data:	2013
Resum:	Border disease virus (BDV) causes high mortality in Pyrenean chamois (Rupicapra pyrenaica) on the French and Spanish sides of the Pyrenees Mountains. We investigated the pathology induced by BDV in pregnant chamois via experimental infection. Three females were inoculated during the second third of pregnancy with a BDV-4 subgroup strain isolated from a wild Pyrenean chamois during an acute epizootic. A fourth pregnant chamois and one nonpregnant ewe were kept as negative controls. Animals were monitored to assess clinical signs, hematology, viremia, and serology. Postmortem examinations included necropsy, histopathology, and quantification of viral RNA in organs. Pregnancy was unsuccessful in all inoculated animals. One died 24 days postinoculation (dpi) without showing any precursory clinical signs. The second animal had profuse diarrhea from 13 dpi to its death at 51 dpi. The third aborted at 46 dpi and was euthanized at 51 dpi. All animals were viremic from 4 dpi until death. Neutralizing antibodies against BDV-4 were detected from 12 dpi. Necropsies showed generalized lymphadenomegaly, associated in one case with disseminated petechial hemorrhages in the digestive tract. Seventy-eight of 79 organs from inoculated adults and their fetuses had detectable viral RNA. The main histologic lesions in adults were mild lymphohistiocytic encephalitis associated with moderate or moderately severe lymphoid depletion. Control animals remained negative for virus (in blood and organs), antibody, and lesions upon postmortem examination. BDV infection during pregnancy in Pyrenean chamois causes severe disease leading to abortion, then death. Despite 100% fetal death following inoculation, viral RNA was recovered from all organs of infected fetuses, suggesting that persistently infected offspring could be born. Our results may help explain the reported decrease in chamois populations in several areas and suggest that great care must be taken when interpreting infection status for wildlife.
Nota:	Altres ajuts: ANSES/A06-018-2
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Isards ; Virosi ; Remugants ; Animals salvatges ; Malalties ; Border disease virus ; Experimental infection ; Pathogenicity ; Pestivirus ; Pregnancy ; Pyrenean chamois ; Rupicapra pyrenaica
Publicat a:	Journal of Wildlife Diseases, Vol. 49 Núm. 1 (2013) , p. 55-68, ISSN 1943-3700

DOI: 10.7589/2011-09-260
PMID: 23307372

14 p, 396.4 KB

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