Derzsy's disease, which is seen in goslings (Anser anser domestica) and Muscovy ducks (Cairina moschata), progresses to high mortality and causes significant yield losses. The disease agent is goose parvovirus (GPV), which is common in countries with waterfowl production. It has not previously been reported in Turkey. Using qPCR and sequencing of the VP3 protein-encoding gene, GPV is identified as the causative agent of high mortality among geese between 2018 and 2019. The VP3 sequences were also compared with the similar GenBank sequences phylogenetically. All the sequences were found to be most similar (98.90%) with Polish and Taiwan GPV strains. Phylogenetic analysis of the VP3 gene in strains in Turkey and comparison with strains from other countries demonstrated that the Turkish strains are native to the geography and circulated locally. This study detected the presence of the GPV gene for the first time in Turkey and demonstrated the importance of comparing the vaccine strain and wild type.
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