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Changes of biochemical parameters and enzyme activities in broiler chickens with cold-induced ascites

Excellence Center for Animal Sciences Research and Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, PO Box 91775-1163, Mashhad, Iran

¹ Corresponding author: kermansh{at}ferdowsi.um.ac.ir

An experiment with 250 one-day-old male broilers (Ross 308) was conducted to investigate the differences of some blood parameters of cold-induced ascitic and healthy broiler chicks in a 6-wk period. The chickens were divided into 2 groups of 5 replicates each. One group of these chickens was raised in normal temperature (NT) treatment and the other in cold temperature (CT) treatment to induce ascites. Mortality was necropsied daily to determine cause of death. At the end of the experiment (wk 6), 5 chickens from each replicate were randomly selected and slaughtered. The heart was removed; the right ventricle was dissected away from the left ventricle and septum. Weights of right and left ventricles were determined separately. Average BW gain and average feed intake were measured weekly, and weekly average feed conversion ratio was calculated. Serum glucose, total protein, cholesterol, triglyceride, activity of lactate dehydrogenase, as-partate aminotransferase, and alanine aminotransferase were determined. Throughout the study, the right ventricle-to-total ventricle ratio and total mortality percentage due to ascites of CT-treated birds at the end of experiment was greater (P 0.05) than those of NT-treated ones. Fasting blood sugar of CT-treated birds in wk 4 and 6 was greater (P 0.05) than NT-treated birds. Total blood protein of CT treatment was lower than NT-treated birds in every week and whole period, but this difference was only significant (P 0.05) in wk 6. There was not a significant difference between 2 treatments for triglyceride and cholesterol, lactate dehydrogenase, aspartate aminotransferase, and alanine aminotransferase. It was concluded that cold-induced ascites could affect serum protein and fasting blood sugar of broiler chickens.

Key Words: ascites • biochemical parameter • enzyme activity • broiler