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Front Vet Sci
January 2025
Jiangsu Agri-animal Husbandry Vocational College, Taizhou, Jiangsu, China.
Introduction: The H9N2 avian influenza virus is widely disseminated in poultry and poses a zoonotic threat, despite vaccination efforts. Mutations at residue 198 of hemagglutinin (HA) are critical for antigenic variation and receptor-binding specificity, but the underlying molecular mechanisms remain unclear. This study explores the molecular mechanisms by which mutations at the HA 198 site affect the antigenicity, receptor specificity, and binding affinity of the H9N2 virus.
View Article and Find Full Text PDFFront Immunol
January 2025
College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, China.
Introduction: Animal influenza viruses pose a danger to the general public. Eurasian avian-like H1N1 (EA H1N1) viruses have recently infected humans in several different countries and are often found in pigs in China, indicating that they have the potential to cause a pandemic. Therefore, there is an urgent need to develop a potent vaccine against EA H1N1.
View Article and Find Full Text PDFVet Immunol Immunopathol
January 2025
Department of Veterinary and Animal Sciences, University of Copenhagen, Dyrlægevej 88, Frederiksberg C 1870, Denmark.
Newcastle disease (ND) is a notifiable avian disease responsible for several panzootics, which has resulted in the establishment of mandatory vaccination programs against the virus in several countries including Denmark. This study compared the immune response elicited in layers by the standard vaccination program for ND of a Danish commercial egg production facility with a simplified version of the vaccination program. A commercial flock of layers was followed for 77 weeks from hatching to culling.
View Article and Find Full Text PDFToxicol Rep
June 2025
Department of Animal Sciences, Faculty of Agriculture, University of Zabol, Sistan 98661-5538, Iran.
This study aimed to investigate the effects of dietary methionine (Met) supplementation on performance, immunity, and meat quality in growing Japanese quail exposed to aflatoxin B (AFB)-contaminated diets. Nine experimental diets were formulated, incorporating three levels of dietary Met (5.0, 6.
View Article and Find Full Text PDFEcohealth
January 2025
Universidade Federal do Vale do São Francisco, Rodovia BR-407, KM 12, Lote 543, Sem Número, Projeto de Irrigação Nilo Coelho, Petrolina, Pernambuco, 56300-000, Brazil.
Arbovirus surveillance in marmosets (Callithrix spp.) that live close to humans helps identify viral circulation in the environment and contributes to public health. We investigated the exposure to arboviral infections in 47 captive and free-living Callithrix from urban and peri-urban areas in the semiarid region of northeastern Brazil (SNB) in 2018.
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