Effect of Bacillus Licheniformis on blood lipid profile of broiler chickens in heat stress condition

Objectives: The aim of this study was to examine the effectof Bacillus Lechniformisprobiotic on blood lipid profile and lipoprotein indicators ofbroiler chickens inheat stress condition.Materials Methods: 280 one-day-old female broilers (Ross 308) were reared in factorial experiment 2×2in two separated rooms withtwo levels of temperatures (normal and heat stress condition) andtwo levels of Bacillus Lechniformis probiotic which isolated from intestine of local broiler chickens (0, 2 ml (6×10^8 bacteria) per one liter of drinking water) whichused from first day until the end of the experiment. Heat stress was createdin the temperature range of 34-36°C. At 42 days, blood samples fromtwo birds of each penand from their wing vein were obtained. Triglycerides, total cholesterol, HDL-C, LDL-C and VLDL-C were measuredto study the blood lipid profile and triglycerides to HDL-C ratio, total cholesterol to HDL-C ratio and LDL-C to HDL-C ratio to evaluate bloodlipoprotein indicators. Results Conclusion: The analyzed data for blood lipid profile indicated that broilers which received Bacillus Lechniformis in their drinking water in normal condition had lowest levels of total cholesterol(p 0.001), triglycerides and VLDL-C (p 0.05) to compared control group. While, broilers which grown in heat stress condition had lowest levels of HDL-C and LDL-C (p 0.001).Results ofblood lipoprotein indicators showed that lowest ratios of total cholesterol to HDL-C (p 0.001) andtriglycerides to HDL-C (p 0.05) were observed in Bacillus Lechniformistreatment in normal condition. However, heat stress condition increased total cholesterol to HDL-C ratio (p 0.05). Treatments have no significantly differences on LDL-C/HDL-C ratio (P 0.05). Also, the use of Bacillus Lechniformisprobiotic in drinking water of broiler chickens has no significantly differences on blood parameters in heat stress condition (P 0.05).