तपेदिक का कारण बनने वाला एजेंट क्या है? विशेषताओं, रोगजनकता, और सार्वजनिक स्वास्थ्य महत्व का वर्णन करें। (What is the causative agent of Tuberculosis? Describe the characteristics, pathogenicity, and public health significance.) (UPSC 2017,15 Marks,)

What is the causative agent of Tuberculosis? Describe the characteristics, pathogenicity, and public health significance.