FACTORS
CONTRIBUTING TO YOLK RETENTION
IN POULTRY: A REVIEW
K. A. Khan, S. A.Khan, A. Aslam, M.
Rabbani1 and M.Y. Tipu
Department of Pathology and 1Department
of Microbiology,University
of
Veterinary
and Animal Sciences,
Lahore,
Pakistan
Abstract
Yolk
retention and yolk sac infection is considered as an important cause of death in
chicken as well as in guinea fowl, duck, turkey, quail andgoose. The factors which slow down the rate of yolk absorption and may in
turn, lead to yolk retention are discussed. Yolk sac infection of bacterial
origin is most important among these factors. Other factors which may contribute
include posthatch starvation, type of initial feed, brooding temperature,
prolonged exposure to hatcher environment and size of birds.