Highly Pathogenic Avian Influenza H5N8 in Poland in 2019-2020.
H5N8
epidemic
highly pathogenic avian influenza
Journal
Journal of veterinary research
ISSN: 2450-7393
Titre abrégé: J Vet Res
Pays: Poland
ID NLM: 101696630
Informations de publication
Date de publication:
Dec 2020
Dec 2020
Historique:
received:
11
09
2020
accepted:
17
11
2020
entrez:
28
12
2020
pubmed:
29
12
2020
medline:
29
12
2020
Statut:
epublish
Résumé
Repeated incursions of highly pathogenic avian influenza virus (HPAIV) H5 subtype of Gs/GD lineage pose a serious threat to poultry worldwide. We provide a detailed analysis of the spatio-temporal spread and genetic characteristics of HPAIV Gs/GD H5N8 from the 2019/20 epidemic in Poland. Samples from poultry and free-living birds were tested by real-time RT-PCR. Whole genome sequences from 24 (out of 35) outbreaks were generated and genetic relatedness was established. The clinical status of birds and possible pathways of spread were analysed based on the information provided by veterinary inspections combined with the results of phylogenetic studies. Between 31 December 2019 and 31 March 2020, 35 outbreaks in commercial and backyard poultry holdings and 1 case in a wild bird were confirmed in nine provinces of Poland. Most of the outbreaks were detected in meat turkeys and ducks. All characterised viruses were closely related and belonged to a previously unrecognised genotype of HPAIV H5N8 clade 2.3.4.4b. Wild birds and human activity were identified as the major modes of HPAIV spread. The unprecedentedly late introduction of the HPAI virus urges for re-evaluation of current risk assessments. Continuous vigilance, strengthening biosecurity and intensifying surveillance in wild birds are needed to better manage the risk of HPAI occurrence in the future.
Identifiants
pubmed: 33367134
doi: 10.2478/jvetres-2020-0078
pii: jvetres-2020-0078
pmc: PMC7734677
doi:
Types de publication
Journal Article
Langues
eng
Pagination
469-476Informations de copyright
© 2020 K. Śmietanka et al. published by Sciendo.
Déclaration de conflit d'intérêts
Conflict of Interest Conflict of Interests Statement: The authors declare that there is no conflict of interests regarding the publication of this article.
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