Egg Industry - April 2018 - 14
14 ❙ EggIndustry
PULLET COCCIDIOSIS VACCINATION
Bird density is a key to successful immunization of flocks raised
on the floor. Controlling the density
helps regulate the rate of ingestion
of oocysts - too many oocysts can
cause intestinal damage, while too
few available oocysts can result in
delayed or inadequate immunity.
Also, bird density needs to be
monitored to ensure there is not too
much competition for feed and wa-
ter, which affects pullet uniformity.
Litter management is important
to maintain the proper environment
for oocysts to reproduce. Ideal litter
conditions include a temperature of
82 F to 85 F and a moisture level of
25 to 35 percent. Monitor and adjust
ventilation settings to help maintain
proper litter humidity. Extremely
high litter moisture levels result
in too many oocysts reproducing,
which can cause clinical disease.
Use litter that will absorb moisture
Space recommendations for cage-free
pullets after coccidiosis vaccination
Space per bird
Source: Dr. Kelli Jones, CEVA Manager Technical Services
General guidelines on floor stocking densities for cage-free pullets the
first two weeks after coccidiosis vaccination.
such as wood shavings or rice hulls.
Avoid turning the litter over during
the first four to five weeks while the
vaccine is cycling. Ensure all watering equipment is in good working
order and not leaking.
Starting pullets in cages
Heavy, waxed cage paper,
pressed fiber flats or even the rough
bottoms of paper plates are used on
cage floors to collect manure and allow chicks' access to oocysts for the
At least 40 percent of available
floor space should be covered by the
paper. Producers should use paper
products that will remain viable for
21 to 28 days. During the first week
feed should be spread on the paper
to encourage picking at the feed and
feces to ensure oocyst consumption.
After initial brooding, pullets
are often moved to different tiers to
Cage paper should cover 40 percent of floor space. Kayla Price
www.WATTAgNet.com ❙ April 2018