African swine fever in wild boar

Miranda Miguel Angel, Bicout Dominique, Bøtner Anette, Butterworth Andrew, Calistri Paolo, Edwards Sandra, Garin-Bastuji Bruno, Good Margaret, Michel Virginie, Raj Mohan, Nielsen Søren Saxmose, Sihvonen Liisa, Spoolder Hans, Stegeman Jan Arend, Velarde Antonio, Simon Moore, Willeberg Preben, Winckler Christoph, Depner Klaus, Guberti VittorioMasiulis Marius, Olsevskis Edvins, Satran Petr, Spiridon Mihaela, Thulke Hans-Hermann, Vilrop Arvo, Wozniakowski Grzegorz, Bau Andrea, Broglia Alessandro, Cortiñas Abrahantes José, Dhollander Sofie, Gogin Andrey, Muñoz Gajardo Irene, Verdonck Frank, Amato Laura, Gortázar Schmidt Christian

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Abstract

The European Commission requested EFSA to compare the reliability of wild boar density estimates across the EU and to provide guidance to improve data collection methods. Currently, the only EU-wide available data are hunting data. Their collection methods should be harmonised to be comparable and to improve predictive models for wild boar density. These models could be validated by more precise density data, collected at local level e.g. by camera trapping. Based on practical and theoretical considerations, it is currently not possible to establish wild boar density thresholds that do not allow sustaining African swine fever (ASF). There are many drivers determining if ASF can be sustained or not, including heterogeneous population structures and human-mediated spread and there are still unknowns on the importance of different transmission modes in the epidemiology. Based on extensive literature reviews and observations from affected Member States, the efficacy of different wild boar population reduction and separation methods is evaluated. Different wild boar management strategies at different stages of the epidemic are suggested. Preventive measures to reduce and stabilise wild boar density, before ASF introduction, will be beneficial both in reducing the probability of exposure of the population to ASF and the efforts needed for potential emergency actions (i.e. less carcass removal) if an ASF incursion were to occur. Passive surveillance is the most effective and efficient method of surveillance for early detection of ASF in free areas. Following focal ASF introduction, the wild boar populations should be kept undisturbed for a short period (e.g. hunting ban on all species, leave crops unharvested to provide food and shelter within the affected area) and drastic reduction of the wild boar population may be performed only ahead of the ASF advance front, in the free populations. Following the decline in the epidemic, as demonstrated through passive surveillance, active population management should be reconsidered.
Original languageEnglish
Article numbere05344
Number of pages78
JournalEFSA Journal
Volume16
Issue number7
Early online date11 Jul 2018
DOIs
Publication statusPublished - Jul 2018

Keywords

  • African swine fever
  • wild boar
  • population density
  • population density threshold
  • population reduction
  • population separation
  • passive surveillance

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