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Selective replication and vertical transmission of Ebola virus in experimentally infected Angolan free-tailed bats

Author

Listed:
  • S. A. Riesle-Sbarbaro

    (Robert Koch Institute)

  • G. Wibbelt

    (Leibniz Institute for Zoo and Wildlife Research)

  • A. Düx

    (Robert Koch Institute
    Helmholtz Institute for One Health)

  • V. Kouakou

    (LANADA, Laboratoire National d’Appui au Développement Agricole)

  • M. Bokelmann

    (Robert Koch Institute)

  • K. Hansen-Kant

    (Robert Koch Institute)

  • N. Kirchoff

    (Robert Koch Institute)

  • M. Laue

    (Robert Koch Institute)

  • N. Kromarek

    (Robert Koch Institute)

  • A. Lander

    (Robert Koch Institute)

  • U. Vogel

    (Robert Koch Institute)

  • A. Wahlbrink

    (Robert Koch Institute)

  • D. M. Wozniak

    (Robert Koch Institute
    Bernhard-Nocht-Institute for Tropical Medicine)

  • D. P. Scott

    (National Institutes of Health)

  • J. B. Prescott

    (Robert Koch Institute)

  • L. Schaade

    (Robert Koch Institute)

  • E. Couacy-Hymann

    (LANADA, Laboratoire National d’Appui au Développement Agricole
    Centre National de Recherches Agronomiques, LIRED)

  • A. Kurth

    (Robert Koch Institute)

Abstract

The natural reservoir of Ebola virus (EBOV), agent of a zoonosis burdening several African countries, remains unidentified, albeit evidence points towards bats. In contrast, the ecology of the related Marburg virus is much better understood; with experimental infections of bats being instrumental for understanding reservoir-pathogen interactions. Experiments have focused on elucidating reservoir competence, infection kinetics and specifically horizontal transmission, although, vertical transmission plays a key role in many viral enzootic cycles. Herein, we investigate the permissiveness of Angolan free-tailed bats (AFBs), known to harbour Bombali virus, to other filoviruses: Ebola, Marburg, Taï Forest and Reston viruses. We demonstrate that only the bats inoculated with EBOV show high and disseminated viral replication and infectious virus shedding, without clinical disease, while the other filoviruses fail to establish productive infections. Notably, we evidence placental-specific tissue tropism and a unique ability of EBOV to traverse the placenta, infect and persist in foetal tissues of AFBs, which results in distinct genetic signatures of adaptive evolution. These findings not only demonstrate plausible routes of horizontal and vertical transmission in these bats, which are expectant of reservoir hosts, but may also reveal an ancillary transmission mechanism, potentially required for the maintenance of EBOV in small reservoir populations.

Suggested Citation

  • S. A. Riesle-Sbarbaro & G. Wibbelt & A. Düx & V. Kouakou & M. Bokelmann & K. Hansen-Kant & N. Kirchoff & M. Laue & N. Kromarek & A. Lander & U. Vogel & A. Wahlbrink & D. M. Wozniak & D. P. Scott & J. , 2024. "Selective replication and vertical transmission of Ebola virus in experimentally infected Angolan free-tailed bats," Nature Communications, Nature, vol. 15(1), pages 1-15, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45231-0
    DOI: 10.1038/s41467-024-45231-0
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