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      Highly pathogenic avian influenza A(H5N1) virus infection in farmed minks, Spain, October 2022

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          Abstract

          In October 2022, an outbreak in Europe of highly pathogenic avian influenza (HPAI) A(H5N1) in intensively farmed minks occurred in northwest Spain. A single mink farm hosting more than 50,000 minks was involved. The identified viruses belong to clade 2.3.4.4b, which is responsible of the ongoing epizootic in Europe. An uncommon mutation (T271A) in the PB2 gene with potential public health implications was found. Our investigations indicate onward mink transmission of the virus may have occurred in the affected farm.

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          Most cited references16

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          Detection of 2019 novel coronavirus (2019-nCoV) by real-time RT-PCR

          Background The ongoing outbreak of the recently emerged novel coronavirus (2019-nCoV) poses a challenge for public health laboratories as virus isolates are unavailable while there is growing evidence that the outbreak is more widespread than initially thought, and international spread through travellers does already occur. Aim We aimed to develop and deploy robust diagnostic methodology for use in public health laboratory settings without having virus material available. Methods Here we present a validated diagnostic workflow for 2019-nCoV, its design relying on close genetic relatedness of 2019-nCoV with SARS coronavirus, making use of synthetic nucleic acid technology. Results The workflow reliably detects 2019-nCoV, and further discriminates 2019-nCoV from SARS-CoV. Through coordination between academic and public laboratories, we confirmed assay exclusivity based on 297 original clinical specimens containing a full spectrum of human respiratory viruses. Control material is made available through European Virus Archive – Global (EVAg), a European Union infrastructure project. Conclusion The present study demonstrates the enormous response capacity achieved through coordination of academic and public laboratories in national and European research networks.
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            Median-joining networks for inferring intraspecific phylogenies

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              Median-joining networks for inferring intraspecific phylogenies.

              Reconstructing phylogenies from intraspecific data (such as human mitochondrial DNA variation) is often a challenging task because of large sample sizes and small genetic distances between individuals. The resulting multitude of plausible trees is best expressed by a network which displays alternative potential evolutionary paths in the form of cycles. We present a method ("median joining" [MJ]) for constructing networks from recombination-free population data that combines features of Kruskal's algorithm for finding minimum spanning trees by favoring short connections, and Farris's maximum-parsimony (MP) heuristic algorithm, which sequentially adds new vertices called "median vectors", except that our MJ method does not resolve ties. The MJ method is hence closely related to the earlier approach of Foulds, Hendy, and Penny for estimating MP trees but can be adjusted to the level of homoplasy by setting a parameter epsilon. Unlike our earlier reduced median (RM) network method, MJ is applicable to multistate characters (e.g., amino acid sequences). An additional feature is the speed of the implemented algorithm: a sample of 800 worldwide mtDNA hypervariable segment I sequences requires less than 3 h on a Pentium 120 PC. The MJ method is demonstrated on a Tibetan mitochondrial DNA RFLP data set.
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                Author and article information

                Journal
                Euro Surveill
                Euro Surveill
                eurosurveillance
                Eurosurveillance
                European Centre for Disease Prevention and Control (ECDC)
                1025-496X
                1560-7917
                19 January 2023
                : 28
                : 3
                : 2300001
                Affiliations
                [1 ]Laboratorio Central de Veterinaria (LCV), Ministry of Agriculture, Fisheries and Food, Algete, Madrid, Spain
                [2 ]Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
                [3 ]Counselling of Health, Xunta de Galicia, A Coruña, Spain
                [4 ]Galician Mink Breeders Association, Santiago de Compostela, A Coruña, Spain
                [5 ]Livestock Service, Counselling of Rural Affairs, Xunta de Galicia, A Coruña, Spain
                [6 ]Animal Health Service, Counselling of Rural Affairs, Xunta de Galicia, A Coruña, Spain
                Author notes
                [*]

                These authors contributed equally to this work and share first authorship.

                Correspondence: Isabella Monne ( imonne@ 123456izsvenezie.it )

                Author information
                http://orcid.org/0000-0002-6564-4689
                https://orcid.org/0000-0001-9566-6531
                https://orcid.org/0000-0002-8213-5472
                https://orcid.org/0000-0002-3934-9061
                Article
                2300001 2300001
                10.2807/1560-7917.ES.2023.28.3.2300001
                9853945
                36695488
                5e9c48e5-6050-4305-8216-692e41b5a4b8
                This article is copyright of the authors or their affiliated institutions, 2023.

                This is an open-access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0) Licence. You may share and adapt the material, but must give appropriate credit to the source, provide a link to the licence, and indicate if changes were made.

                History
                : 02 January 2023
                : 18 January 2023
                Categories
                Rapid Communication
                Custom metadata
                2

                mink,influenza a,h5n1,hpai,spain,mammal,mutations,pb2
                mink, influenza a, h5n1, hpai, spain, mammal, mutations, pb2

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