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The Effect Of Chronic Heat Stress On The Urinary System Pathology Of Broilers, Worapol Aengwanich, Suchint Simaraks

The Thai Journal of Veterinary Medicine

Thirty six, one day old broiler chicks were obtained from a commercial hatchery. They were brooded for 20 days before being placed in layer cages, with a wire floor, at 26-28oC, for a 7 day adaptation period. On day 28, the broilers were transferred into environmentally controlled housing, at 26-28oC, and were subjected to heat stress for 5 hrs, at a temperature of 33±1oC, each day, for 21 days. Fifteen birds were then randomly killed by cervical dislocation for macroscopic and microscopic examination of the urinary system. The results revealed that the ureters in 9 out of 15 broilers showed …