Color enhanced scanning electron micrograph (SEM) of Mycobacterium tuberculosis H37Rv. M. tuberculosis is the causative agent of tuberculosis in man, a disease that effects the respiratory system and may effect skin, bones, joints, and the nervous system. TB is characterized by inflammation,, formation of tubercles, casetion, necrosis, abscesses, fibrosis and calcification. Infection is acquired through contact with an infected person, cow, or through drinking contaminated cows milk. SEM 12,000x at 35mm.