Evaluation of Clinical Markers for Diagnosis of Bovine Theileriosis -A Study of 21 Calves

21 bovine calves aged between 15 to 60 days naturally infected with Theileria annulata were inspected ardently for clinical markers. Clinical manifestations of generalized lymph nodes enlargement, pallor mucous membrane, reduced appetite and pyrexia were revealed by more than 75% of infected calves. While, clinical manifestations of pica, coughing and respiratory distress, lacrimation and exophthalmia were revealed by more than 50% of infected calves. Clinical manifestations of petechiae and/or ecchymoses on sclera, conjunctival mucous membrane, tongue and ear pinna, lateral recumbency and submandibular and/or ventral edema were revealed by more than 25% of infected calves. While, less than 25% of infected calves revealed clinical manifestations of diarrhea, melena, haemoglobinuria and yellow mucous membrane. The study indicated that generalized lymph nodes enlargement, pallor mucous membrane, pyrexia, pica, coughing and respiratory distress, lacrimation and exophthalmia are the major clinical markers, pivotal for clinical diagnosis of theileriosis in field conditions.