Haemato-biochemical alterations in cross-bred cattle naturally infected with Theileria annulata.

摘要

102 crossbred cattle (adults as well as calves) of either sex were selected on the basis being infected with Hyalomma tick on their body. Blood samples were collected for haematological analysis. Biochemical parameters included estimation of total protein, total serum bilirubin, serum alkaline phosphatase and blood urea nitrogen. The Hyalomma ticks were collected from the selected animals and dissected. The haematological and biochemical profiles of 10 normal healthy cattle free from tick infestation were also determined and served as control (Group I), On the basis of tick salivary examination, blood and lymph node smear examination, 102 animals were divided into 3 groups. Group II - (Theileria annulata present both in cattle and Hyalomma ticks), Group III - (T. annulata present only in Hyalomma ticks) and Group IV - (T. annulata absent both in cattle and Hyalomma ticks). After examining the blood samples, results showed that blood smears revealed pleomorphic T. annulata piroplasms in the erythrocytes. Lymph node smears revealed schizontal stages of T. annulata in lymphocytes. Results also revealed that the levels of haemoglobin (Hb), packed cell volume (PCV), total erythrocyte count, total leukocyte count were significantly reduced in infected animals when compared with the control group.