{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T03:12:06Z","timestamp":1792725126304,"version":"4.5.0"},"reference-count":62,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T00:00:00Z","timestamp":1768348800000},"content-version":"vor","delay-in-days":13,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Veterinary Medicine &amp; Sci"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Peptides alone often exhibit limited immunogenicity, necessitating the development of effective antigen delivery systems to facilitate recognition and presentation, ultimately eliciting robust immune responses and activating T and B lymphocytes. Filamentous bacteriophages, such as M13, are recognized as efficient platforms for peptide expression and presentation via their capsid surfaces. The conserved amino acid sequence HA2 1\u20139 (GLFGAIAGF) from the haemagglutinin (HA) transmembrane protein of Influenza A virus (IAV) has been identified as a promising immunogen for eliciting broad\u2010spectrum immune responses against diverse IAV strains. In this study, the N\u2010terminal fragment of Protein VIII from M13 phage was genetically engineered to express the conserved HA2 1\u20139 sequence. High\u2010level expression of the HA2 peptide on the phage surface was confirmed via immunoblotting analysis. Birds were intramuscularly vaccinated with the recombinant M13 phage displaying the HA2 peptide and subsequently challenged intranasally with the H9N2 IAV subtype. The results demonstrated that the GLFGAIAGF peptide elicited specific immunoglobulin Y (IgY) antibody responses against the HA2 peptide in birds. However, vaccination did not lead to a significant reduction in the shedding of H9N2 virus in the trachea and cloaca. This study highlights the potential of phage display platforms for antigen expression and immune activation. While the conserved GLFGAIAGF epitope successfully induced specific IgY responses, the limited efficacy in reducing viral shedding underscores the need for further optimization of the vaccination regimen, as well as investigation of alternative delivery routes, such as intranasal or oral administration, to enhance protective efficacy.<\/jats:p>","DOI":"10.1002\/vms3.70780","type":"journal-article","created":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T09:41:03Z","timestamp":1768383663000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Phage\u2010Mediated Presentation of a Conserved HA2 Epitope From Influenza A Virus Elicits Significant IgY Antibody Responses in Broiler Chickens"],"prefix":"10.1002","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4270-1089","authenticated-orcid":false,"given":"Zinat","family":"Lotfi","sequence":"first","affiliation":[{"name":"Department of Pathobiology, 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