Highly Pathogenic Avian Influenza H5N8 in Poland in 2019–2020
| Autor: | E. Kozak, Grzegorz Tomczyk, Mirosław Welz, Bogdan Konopka, Karolina Tarasiuk, Krzysztof Niemczuk, Krzysztof Wyrostek, Katarzyna Domańska-Blicharz, Edyta Świętoń, Krzysztof Śmietanka |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
040301 veterinary sciences
animal diseases Veterinary medicine Highly pathogenic Biosecurity Zoology Biology medicine.disease_cause Virus epidemic 0403 veterinary science 03 medical and health sciences H5N8 SF600-1100 Genotype medicine highly pathogenic avian influenza Clade 030304 developmental biology 0303 health sciences General Veterinary virus diseases Outbreak 04 agricultural and veterinary sciences Influenza A virus subtype H5N1 Highly Pathogenic Avian Influenza Virus Research Article |
| Zdroj: | Journal of Veterinary Research Journal of Veterinary Research, Vol 64, Iss 4, Pp 469-476 (2020) |
| ISSN: | 2450-8608 2450-7393 |
| Popis: | Introduction 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. Material and methods 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. Results 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. Conclusion 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. |
| Databáze: | OpenAIRE |
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