CLINICO-THERAPEUTIC STUDIES ON BOVINE THEILERIOSIS
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Date
2018
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COLLEGE OF VETERINARY AND ANIMAL SCIENCES-MANNUTHY,THRISSUR
Abstract
Bovine theileriosis is an economically important tick-borne protozoan disease
that affects cattle all over the world. The present study titled “Clinico-therapeutic
studies on bovine theileriosis” envisages diagnosis and treatment of oriental theileriosis
in dairy cattle. Microscopical examination of stained blood smears from 187 animals
revealed Theileria spp. piroplasms in 61 cases, inclusions suggestive of A. marginale
in 18 cases, concurrent infection of theileria and anaplasma in 32 cases and piroplasms
of Babesia bigemina in one animal. Blood smears from positive cases were later
confirmed by Acridine orange staining. Genus specific PCR for Theileria spp. yielded
positive results in 58 clinical cases and 37 in-contact animals. Out of 58 positive cases,
50 were confirmed as T. orientalis using species specific PCR. Among the in-contact
animals, all 37 positive cases were positive for T. orientalis. None of the samples from
58 clinical cases and 37 in-contact animals yielded positive results of T. annulata.
Major clinical signs observed were anaemia, pyrexia, lymph node enlargement,
lethargy and drop in milk production. Haemato-biochemical analysis revealed anaemia
with low Hb, PCV and TEC and hyperproteinaemia with hyperglobulinaemia in the
affected animals. Treatment with single dose of buparvaquone @ 2.5 mg/kg BW
intramuscularly was found to be more effective than two doses of long acting
oxytetracycline @ 20 mg/kg BW intramuscularly 48 hours apart.