Publications by authors named "B Gjerset"
Article Synopsis
- * Post-mortem examinations of WTEs showed no major visible issues, but microscopic analyses revealed organ damage and virus presence, indicating a widespread infection.
- * Phylogenetic studies indicate the HPAIV H5N1 genotype was likely introduced to Norway by migratory birds and was linked to outbreaks in seabirds, suggesting WTEs may act as indicators for these viruses, though not all strains seem to affect them similarly.
Highly pathogenic avian influenza (HPAI) viruses have spread at an unprecedented scale, leading to mass mortalities in birds and mammals. In 2023, a transatlantic incursion of HPAI A(H5N5) viruses into North America was detected, followed shortly thereafter by a mammalian detection. As these A(H5N5) viruses were similar to contemporary viruses described in Eurasia, the transatlantic spread of A(H5N5) viruses was most likely facilitated by pelagic seabirds.
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- The Visna-maedi disease is a targeted elimination goal in Norway, with strict movement regulations for sheep to prevent outbreaks.
- In 2019, a national surveillance program identified multiple infected sheep flocks in Trøndelag, leading to restrictions on those flocks and their contacts.
- The findings emphasize the need for better diagnostic methods, a robust surveillance strategy, and enhanced biosecurity measures to prevent disease spread and work toward eradicating maedi from Norwegian sheep.
The Maedi-visna virus (MVV) causes a persistent infection in small ruminants, and its high genetic heterogeneity affects the performance of diagnostic tests when used in different populations. Therefore, the aim of this study was to develop a bead-based multiplex immunoassay tailored to detect antibodies against a Norwegian MVV strain. We used tissue samples from 14 PCR-positive sheep from a recent MVV outbreak in Norway to sequence the viral strain and produced recombinant antigens based on sequences from one animal.
View Article and Find Full Text PDFSince 2016, A(H5Nx) high pathogenic avian influenza (HPAI) virus of clade 2.3.4.
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