Publications by authors named "A Chastagner"

African swine fever (ASF) is a contagious viral disease of suids that induces high mortality in domestic pigs and wild boars. Given the current spread of ASF, the development of a vaccine is a priority. During an attempt to inactivate the Georgia 2007/1 strain via heat treatment, we fortuitously generated an attenuated strain called ASFV-989.

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Article Synopsis
  • This study examined the genetic and antigenic changes in swine influenza A viruses (swIAV) in France from 2000 to 2018, focusing on two main H1 lineages: HA-1C and HA-1B.
  • The researchers analyzed swine nasal swabs, leading to the identification of predominant H1N1 and H1N2 subtypes and the discovery of 17 distinct genotypes, highlighting the presence of significant antigenic drift in some strains.
  • Findings also revealed mutations related to virulence and antiviral resistance, emphasizing the need for measures to control the spread of swIAV among pigs and prevent inter-species transmission.
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The surveillance of swine influenza A viruses in France revealed the emergence of an antigenic variant following deletions and mutations that are fixed in the HA-encoding gene of the European human-like reassortant swine H1N2 lineage. In this study, we compared the outcomes of the parental (H1N2) and variant (H1N2) virus infections in experimentally-inoculated piglets. Moreover, we assessed and compared the protection that was conferred by an inactivated vaccine currently licensed in Europe.

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African swine fever is a febrile hemorrhagic fever disease that is caused by the African swine fever virus (ASFV) and is lethal for domestic pigs and wild boar. ASFV also infects soft ticks of the genus Ornithodoros, some species of which can act as a vector for ASFV. Whole genome sequencing of ASFV is a challenge because, due to the size difference of the host genome versus the viral genome, the higher proportion of host versus virus DNA fragments renders the virus sequencing poorly efficient.

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