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Epidemiological and genetic factors affecting severe epizootic hemorrhagic disease in Spanish Holstein cattle during the Southern Europe outbreak of 2023.

J Dairy Sci

January 2025

Confederación de Asociaciones de Frisona Española (CONAFE), Ctra. de Andalucía km 23600 Valdemoro, 28340 Madrid, Spain.

Epizootic hemorrhagic disease (EHD) is a non-contagious viral infection that can cause important economic losses in dairy farms. This study aimed to identify epidemiological and genetic factors influencing the susceptibility and severity of EHD in Holstein dairy cattle during the 2023 outbreak in Spain. Data from 2852 animals in 7 affected farms from 5 Spanish provinces were used.

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The present study evaluated the immunomodulatory and disease resistance-enhancing effects of dietary supplementation of Withania somnifera root powder in Labeo rohita (22.10 ± 3.30 g, 12.

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  • The study focused on the sudden deaths of 30 cervid animals in Assam's State Zoo, linked to peste des petits ruminants (PPR) virus.
  • The affected animals exhibited minimal clinical signs, but necropsy indicated a strong presence of PPRV, confirmed through RT-PCR testing.
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Challenges of BTV-Group Specific Serology Testing: No One Test Fits All.

Viruses

November 2024

The Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory, Australian Centre for Disease Preparedness, 5 Portarlington Road, East Geelong, VIC 3219, Australia.

A newly formatted enzyme-linked immunosorbent assay (ELISA) for the detection of antibodies to bluetongue virus (BTV) was developed and validated for bovine and ovine sera and plasma. Validation of the new sandwich ELISA (sELISA) was achieved with 949 negative bovine and ovine sera from BTV endemic and non-endemic areas of Australia and 752 BTV positive (field and experimental) sera verified by VNT and/or PCR. The test diagnostic sensitivity (DSe) and diagnostic specificity (DSp) were 99.

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Introduction: The late autumn epizootic of the highly pathogenic avian influenza virus (HPAIV) subtype H5N1 in Serbia in 2023 caused massive mortality in the migratory population of common cranes (). This is the first time HPAIV has been identified in the common crane in Serbia, leading to mass mortality of this bird species.

Methods: To understand the pathological impact of HPAIV in cranes, we evaluated the pathological changes in the tissues of common cranes.

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