Vol. 10, Special Issue 11 (2021)

Author(s):
Nikita Bhalakiya, Nilufar Haque, Pankaj Patel, Gaurav Kumar and Deepesh Bharat Mishra

Abstract:
The experiment was carried out to study the effect of heat stress on the haematological parameters of lactating Kankrej cow compared to the thermoneutral period. For the experiment, a total of 12 clinically healthy Kankrej cows were randomly selected from Livestock Research Station (LRS), SDAU and categorized into two different groups according to seasons. The haematological profile viz Total erythrocyte count (TEC), Hemoglobin (Hb), Mean corpuscular haemoglobin (MCH), Mean corpuscular volume (MCV), Mean corpuscular haemoglobin concentration (MCHC), Packed cell volume (PCV), Total leukocyte count (TLC), Differential leukocyte count (DLC) and Platelets (PLT) were recorded. Blood samples were collected thrice from each animal during the summer season and thermoneutral period at fortnight intervals. The blood samples were analyzed by using an Automated Haematology Analyzer (Cell Dyn-3700, Abbott Diagnostics, USA). Haematological analysis revealed that the erythrocytic indices viz. Hb, MCH and MCHC were significantly (P<0.05) higher during the summer season than the thermoneutral period. However, non-significant (p>0.05) variations was observed in the values of TEC, PCV and MCV during different seasons. The total leukocyte counts and lymphocyte counts were significantly (P<0.05) lower during the summer season as compared thermoneutral period. However, non-significant (p>0.05) variations were observed in the neutrophil, monocyte, eosinophil and basophil values.