Understanding the Why: Vaccination Efficacy Using In-Ovo Vaccination

Proper application of the in-ovo vaccines is critical to result in a efficacious vaccination.

While some countries or areas of a country may not experience a Marek’s challenge you may still be wanting to in-ovo vaccinate with a recombinant vaccine for protection from other diseases. It is critical that vaccines be prepared and applied correctly. Vaccines must be mixed correctly, utilized in an approved manner before even starting in-ovo vaccination.

In-ovo vaccination presents a few obstacles that can be overcome with proper understanding of what occurs during incubation to prepare the embryo to receive the vaccine and result in an efficacious vaccination.

How the incubators are operating will influence the position of the embryo in the egg at the time of transfer. The time of transfer can impact where the vaccine is deposited and impact whether the embryos are vaccinated or not.

It would be advisable to conduct a site of injection test a couple of times a year to verify that you are conducting in-ovo vaccination at the correct time.

Mike Wineland graduated from University of Wisconsin-Madison, where his PhD was directed toward endocrinology and reproductive physiology of poultry. He worked at North Carolina State University in the Poultry Department for over 30 years and was a professor, extension specialist and departmental extension leader.

During the last 20 years, major emphasis was directed toward research and education for hatchery operations. The research emphasized the optimization of incubation parameters that impacted hatchling quality and subsequent performance in the broiler house.

Upon retirement from North Carolina State University, Mike Wineland developed a consulting business where he investigates problems in hatchery operations and developed additional training for hatchery personnel.
  • Vaccination Efficacy Using In-Ovo Vaccination
Completion rules
  • All units must be completed
  • Leads to a certification with a duration: 3 years