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The goal of the current investigation is to study the effect of vitamin C and acetylsalicylic acid in minimizing the effects of heat stress in terms of hematological values, growth hormone, HSP70 and glutathione. Broiler were randomly distributed into four groups: 1 group was served as the control, the 2 group subjected to heat stress 40±2 oC up to 4 hours/day, the 3 group was subjected to heat stress and vitamin C 360 mg/L via drinking water and the 4 group was exposed to heat stress and acetylsalicylic acid 0.03% via drinking water. The result showed that exposure to heat stress decline in RBCs count, Hb concentration, PCV and percentage of lymphocyte, furthermore elevation in of MCV, heterophils, H/L ratio, and Hsp70 concentration. Administration of vitamin C caused a significant rise RBCs, percentage of lymphocyte and reduces in MCV, MCH value, percentage of heterophils and H/L ratio compared with the heat stress group. Administrations of acetylsalicylic acid were significantly increased the RBCs, and PCV and decrease in MCV, MCH, MCHC values, and H/L ratio compare with the heat stress group. The results did not show a significant change between the tested groups in the levels of glutathione and growth hormone. The study concluded that Vitamin C and acetylsalicylic acid administration as feed additive ameliorating the opposing effect caused by heat stress in the broiler; thus, its administration recommends when there is heat stress exposure.

al-mağallaẗ al-ʻirāqiyyaẗ li-l-ʻulūm al-bayṭariyyaẗ/iraqi journal of veterinary sciences

Effect of vitamin C and acetylsalicylic acid supplementation on some hematological value, heat shock protein 70 concentration and growth hormone level in broiler exposed to heat stress