title: Protection against H7N3 high pathogenicity avian influenza in chickens immunized with a recombinant fowlpox and an inactivated avian influenza vaccines.
abstract: Beginning on June 2012, an H7N3 highly pathogenic avian influenza (HPAI) epizootic was reported in the State of Jalisco (Mexico), with some 22.4 million chickens that died, were slaughtered on affected farms or were preemptively culled on neighboring farms. In the current study, layer chickens were vaccinated with a recombinant fowlpox virus vaccine containing a low pathogenic AI (LPAI) H7 gene insert (rFPV-H7-AIV) and an inactivated oil-emulsified H7N3 AIV vaccine, and subsequently challenged against the Jalisco H7N3 HPAIV. All vaccine combinations provided similar and significant protection against mortality, morbidity, and shedding of challenge virus from the respiratory and gastrointestinal tracts. Serological data also suggested analogous protection from HPAIV among immunized birds. Control of the recent Jalisco AIV infection could be achieved by using various combinations of the two vaccines tested. Even though a single dose of rFPV-H7-AIV vaccine at 1-day-of-age would be the most pragmatic option, optimal protection may require a second dose of vaccine administered in the field.
authors.affiliation: Southeast Poultry Research Laboratory, USDA-ARS, 934 College Station Rd., Athens, GA 30605, United States.
authors.forename: Kateri
authors.initials: K
authors.lastname: Bertran
authors.forename: Mariana
authors.initials: M
authors.lastname: Sá E Silva
authors.forename: Mary J
authors.initials: MJ
authors.lastname: Pantin-Jackwood
authors.forename: David E
authors.initials: DE
authors.lastname: Swayne
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D002645:Chickens; D005587:Fowlpox virus / Q000276:immunology; D057920:Influenza A Virus, H7N3 Subtype / Q000276:immunology; D007252:Influenza Vaccines / Q000008:administration & dosage / Q000276:immunology*; D005585:Influenza in Birds / Q000276:immunology* / Q000517:prevention & control*; D008800:Mexico; D011201:Poultry Diseases / Q000276:immunology / Q000517:prevention & control / Q000821:virology; D012367:RNA, Viral / Q000302:isolation & purification; D014611:Vaccination / Q000662:veterinary*; D015164:Vaccines, Inactivated / Q000008:administration & dosage / Q000276:immunology*; D017201:Virus Shedding / Q000276:immunology; D015047:Zoonoses / Q000517:prevention & control / Q000821:virology
chemical_list: D000914:Antibodies, Viral; D007252:Influenza Vaccines; D012367:RNA, Viral; D015164:Vaccines, Inactivated
keywords: Chickens; H7N3; High pathogenicity avian influenza; Inactivated vaccine; Recombinant fowlpox virus vaccine