摘要：Prevalence of egg bound syndrome in commercial white leghorn layer chicken in Namakkal region of India was studied over a period of two years from June 2009 to May 2011. Out of 24,158 carcasses examined, the egg bound syndrome was noticed in 663 cases with a overall mortality of 0.5 %. The study revealed that heat stress (28.66%), asphyxia (23.23%), hypocalcemia (17.35%), salpingitis (7.54%), large size egg (6.18%), dehydration (5.73%), vent trauma (5.28%), obesity (3.62%), abnormal ovulation (1.81%) and oviduct neoplasm (0.60%) were the various causes of egg bound syndrome in commercial layer chicken. Microbial analysis of the samples revealed the presence of Escherichia coli from cases associated with salpingitis. The syndrome was recorded with highest occurrence in 21-30 wk and 61-70 wk age laying chicken and with a higher incidence in summer season (44.95%).
