Color enhanced transmission electron micrograph (TEM) of Mycobacterium tuberculosis H37Rv. M. tuberculosis is the causative agent of tuberculosis in man. Tuberculosis is a disease characterized by inflammatory infiltration, formation of tubercles, casetion, necrosis, abcesses, fibrosis, and calcification. TB effects the respiratory system, and may effect skin, bones, joints, the nervous system, and the gastrointestinal tract. Infection is acquired through contact with an infected person, cow, or through drinking contaminated milk. 9.7500x at 35mm