RESUMEN
A cross sectional study was conducted to determine the dynamic prevalence of bovine tuberculosis amongst bovine using single intra dermal cervical comparable test (SICCT or CIDT) in North-Eastern agro-climatic zone of Tamil Nadu. In the present study, Out of 1119 blood samples tested from four selected districts of North-Eastern agro-climatic zone of Tamil Nadu, the overall prevalence of M. bovis infection in North-Eastern agro-climatic zones of Tamil Nadu was found to be 8.46 per cent by CIDT and highest prevalence was noticed in Vellore (10.86%) district followed by Kancheepuram (8.20%), Thiruvallur (7.92%) and Chennai (6.86%) districts, which shows the potential to increase the incidence as well as prevalence of the disease since the “test and slaughter” or “culling policy” are yet to be strengthened intensively or warranting the calf-hood immunization against tuberculosis