Studies On Clinical Cases Of Bovine Tropical Theileriasis With Respect To Incidence, Biochemical, Haematological Changes And Its Chemotherapy
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Date
1993
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Birsa Agricultural University, Ranchi
Abstract
Bovine tropical theilerionis caused by Theileria annulata is widely prevalent among cross-bred cattle in and around Ranchi. Genetically improved indigenous Zebu cattle is not free from the disease though they have greater degree of resistance than cross-bred cattle.
The highest incidence (35.48 %) of the disease during the month of July against the lowest (2.77 %) during December indicated the role of ambient temperature in the tropical belt of this subcontinent. Further, it also indicates the role of vector ticks in the production of the disease which appears in large in number during this period.
Incidence of bovine tropical thoileriosis was significantly very high during summer followed by monsoon. This observation also supports the role of temperature, humidity and rain fall in the occurrence of the disease.
The prevalence of theileriosis in Ranchi is highest (25.72 %) in cattle of 2-4 years age group though calf as old as 17 days also found to suffer from the disease. In indigenous stock the prevalence rate was 6.54 % against 24.16 % in cross bred animals.
Theileriosis occurred at higher rate during first and second lactation than during the third lactation and onwards. Stress factors due to long transportation, Calving and inter current infection played important role in its production.