Egg Industry - May 2012 - 3

Finally, McRee said that he does see instances where vaccination crews try to
carry too many birds in one hand or fail
to release birds in a suitable manner.

Vaccination methods
Vaccinations for laying hens are primarily administered in one of five ways:
in the drinking water, as a coarse spray
on the body, with drops in the eye, as
a wing web stick, or as an injection,
either subcutaneous or intramuscular.
McRee said that wing web vaccinations
can be somewhat problematic depending on how they are administered.
Most wing web vaccines are just applied with a prick in the skin and they
are not injected, according to McRee.

Vaccination tips  
✔Don't reconstitute the vaccine any earlier than you have to.
✔Make sure that you keep the reconstituted vaccine clean.
✔Be careful how you handle the birds.
✔For neck injections, there is a section of the neck about one third of the way down that is
between feather tracts and provides a bare spot for vaccination.
Why do we vaccinate? 
✔To prevent clinical disease.
✔To prevent production/performance drops.
✔To protect shell quality.
✔In breeders to provide passive immunity to progeny.
✔To prime birds for subsequent vaccinations.
Vaccination goals  
✔To provide a controlled, predictable, safe and effective immune response.
✔To stimulate protection at the age of least risk.
✔To protect the immune system, ensuring a good future immune response.
✔To induce high maternal antibody for subsequent protection of progeny.

cination. He said that it is possible that labor and material
costs to vaccinate a flock may outweigh the benefits of protection given by a particular vaccination. Ideally, you want
to induce protection in the flock without compromising
flock performance. EI

Eye drop vaccination, pictured here, is one option for vaccine administration.

The needle is just dipped into the vaccine solution and then
stuck in the wing web. He said that if the vaccine reservoir is
open to the air, then it won't take long for the reservoir to be
contaminated, which can ultimately lead to infection at the
vaccination site in the bird.
McRee also stated that birds can wind up with a staphylococcus infection from the vaccination. Staphylococcus
infections can lead to leg infections and foot problems. He
wondered whether or not staphylococcus infections causing
bumble foot in broiler breeders could be coming from wing
web vaccinations.
Sprayers, like a Christmas tree or Steinberger sprayer, can
be effectively used to administer coarse spray vaccines to
hens in cages, McRee reported. He recommended the use of
vaccine stabilizers that also have dye in them so you can see
that the birds have gotten the vaccine. The dye is useful for
all of the methods of vaccine administration.
McRee said that decisions regarding your vaccination
program need to weigh all of the costs and benefits of vacwww.WATTAgNet.com r May 2012 r

EggIndustry r 5


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