title: Comparative field evaluations of in ovo applied technology.
abstract: Mass vaccination of poultry has advanced in recent years with field application of in ovo vaccination technologies in hatcheries worldwide. Working from a laboratory concept to a commercially available system within a matter of a decade, with subsequent full application to 90% of US broiler production a few years later, the commercial systems continue to be an area for study and continued understanding. Within the production setting, 2 methods to evaluate the types of equipment available for this technology were evaluated in this research. Utilizing a whole hatchery approach and paired testing in a field setting allowed for direct comparison of the 2 US-manufactured in ovo systems (Embrex Inovoject System and Intelliject). The results of the whole hatchery study showed an advantage for 1 system at d 18 and 19 transfer, with the Embrex Inovoject System showing as much as a 2.32% advantage in percentage of hatch. Paired testing showed a statistical difference in percentage of hatchability at d 18 of transfer favoring the Embrex Inovoject System but no difference at d 19 transfer. Differences in the 2 systems were additionally evaluated in terms of day of transfer and flock age.
authors.affiliation: Pfizer Animal Health, 1040 Swabia Court, Research Triangle Park, NC 27703, USA. christopher.williams2@pfizer.com
authors.forename: C J
authors.initials: CJ
authors.lastname: Williams
authors.forename: A S
authors.initials: AS
authors.lastname: Zedek
mesh_terms: D000818:Animals; D002642:Chick Embryo; D004334:Drug Administration Schedule; D008380:Marek Disease / Q000517:prevention & control*; D014611:Vaccination / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D014765:Viral Vaccines / Q000008:administration & dosage* / Q000009:adverse effects
chemical_list: D014765:Viral Vaccines