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In late 2023 an H5N1 lineage of high pathogenicity avian influenza virus (HPAIV) began circulating in American dairy cattle Concerningly, high titres of virus were detected in cows' milk, raising the concern that milk could be a route of human infection. Cows' milk is typically pasteurised to render it safe for human consumption, but the effectiveness of pasteurisation on influenza viruses in milk was uncertain. To assess this, here we evaluate heat inactivation in milk for a panel of different influenza viruses.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong Province, China. Electronic address:
H9N2 avian influenza virus (AIV), a major pathogen causing respiratory infections in poultry, poses a significant threat to the poultry industry and human health. Early detection and control of H9N2 infections are essential for minimizing economic losses and preventing potential zoonotic transmission. A novel CRISPR-Cas family member called CRISPR-Cas13a comprises the CRISPR RNA (crRNA) and Cas13a nuclease.
View Article and Find Full Text PDFStructure
January 2025
Aaron Diamond AIDS Research Center, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10027, USA. Electronic address:
Highly pathogenic avian influenza has spilled into many mammals, most notably cows and poultry, with several dozen human breakthrough infections. Zoonotic crossovers, with hemagglutinins mutated to enhance viral ability to use human α2-6-linked sialic acid receptors versus avian α2-3-linked ones, highlight the pandemic risk. To gain insight into these crossovers, we determined the cryoelectron microscopy (cryo-EM) structure of the hemagglutinin from the zoonotic H5N1 A/Texas/37/2024 strain (clade 2.
View Article and Find Full Text PDFVirology
January 2025
Biomedical Sciences and Molecular Biology, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia; Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, 4811, Australia. Electronic address:
Infectious bronchitis virus (IBV), an avian coronavirus, member of the genus Gammacoronavirus, poses significant threats to poultry health, causing severe respiratory, reproductive, and renal infections. The genetic diversity of IBV, driven by mutations, recombination and deletions, has led to the emergence of numerous serotypes and genotypes, complicating both diagnosis and control measures. Rapid and accurate diagnostic tools are essential for effective disease management and minimizing economic losses.
View Article and Find Full Text PDFScience
January 2025
Department of Infectious Diseases and Microbiology, University of Pittsburgh, Pittsburgh, PA, USA.
Influenza virus pandemics and seasonal epidemics have claimed countless lives. Recurrent zoonotic spillovers of influenza viruses with pandemic potential underscore the need for effective countermeasures. In this study, we show that pre-exposure prophylaxis with broadly neutralizing antibody (bnAb) MEDI8852 is highly effective in protecting cynomolgus macaques from severe disease caused by aerosolized highly pathogenic avian influenza H5N1 virus infection.
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