Studies on Some Aspects of Bovine Tropical Theileriosis in Cattle-calves
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Date
2017
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Rajasthan University of Veterinary and Animal Sciences, Bikaner
Abstract
The present study was carried out to determine the prevalence, haemato-biochemical changes and clinical signs of bovine tropical theileriosis in cattle-calves. A total of one hundred cattle-calves were examined during October-2015 to September-2016 out of which, forty one, seven and three cattle-calves were found positive for Theileria annulata infection on the basis of nested polymerase chain reaction, Giemsa stained blood and lymph node aspirate smears examination, respectively. Prevalence was highest in the month of April (80%) followed by in May (75%) and October (60%) and in females than male cattle-calves. Cattle-calves of 0-2 months of age group and cross-bred were most susceptible to infection. The clinical findings were pyrexia, ticks infestation, icteric/congested/anaemic mucous membrane, swollen superficial lymph nodes, melena or mucous coated diarrhoea, salivation, nasal discharge, lacrimation, anorexia, haemorrhages on sclera, lateral recumbency, dehydration, dyspnoea, pica, circling movement, swelling at knee joints and rough hair coat. Haemato-biochemical examination revealed highly significant (P<0.01) decrease in haemoglobin, packed cell volume, lymphocyte count, serum albumin and serum albumin-globulin ratio; highly significant increase in total leucocyte count, neutrophils, eosinophils and mean corpuscular haemoglobin concentration, significant (P<0.05) increase in mean corpuscular haemoglobin, serum glutamic oxaloacetic transaminase and serum alkaline phosphatase; significant decrease in serum glucose; non-significant (P>0.05) decrease in total erythrocyte count, serum total protein and serum calcium and non-significant increase in monocytes, basophils, mean corpuscular volume, blood urea nitrogen, serum creatinine, serum glutamic pyruvic transaminase and serum globulin. Hence, compared to microscopic examination results, nPCR showed significantly higher efficacy for detection of Theileria spp.
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