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  • Title: Distemper, extinction, and vaccination of the Amur tiger.
    Author: Gilbert M, Sulikhan N, Uphyrkina O, Goncharuk M, Kerley L, Castro EH, Reeve R, Seimon T, McAloose D, Seryodkin IV, Naidenko SV, Davis CA, Wilkie GS, Vattipally SB, Adamson WE, Hinds C, Thomson EC, Willett BJ, Hosie MJ, Logan N, McDonald M, Ossiboff RJ, Shevtsova EI, Belyakin S, Yurlova AA, Osofsky SA, Miquelle DG, Matthews L, Cleaveland S.
    Journal: Proc Natl Acad Sci U S A; 2020 Dec 15; 117(50):31954-31962. PubMed ID: 33229566.
    Abstract:
    Canine distemper virus (CDV) has recently emerged as an extinction threat for the endangered Amur tiger (Panthera tigris altaica). CDV is vaccine-preventable, and control strategies could require vaccination of domestic dogs and/or wildlife populations. However, vaccination of endangered wildlife remains controversial, which has led to a focus on interventions in domestic dogs, often assumed to be the source of infection. Effective decision making requires an understanding of the true reservoir dynamics, which poses substantial challenges in remote areas with diverse host communities. We carried out serological, demographic, and phylogenetic studies of dog and wildlife populations in the Russian Far East to show that a number of wildlife species are more important than dogs, both in maintaining CDV and as sources of infection for tigers. Critically, therefore, because CDV circulates among multiple wildlife sources, dog vaccination alone would not be effective at protecting tigers. We show, however, that low-coverage vaccination of tigers themselves is feasible and would produce substantive reductions in extinction risks. Vaccination of endangered wildlife provides a valuable component of conservation strategies for endangered species.
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