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Tuberculosis, a contagious, wasting disease that commonly attacks the lungs but may affect other organs and systems as well, is caused by several strains of mycobacteria, particularly Mycobacterium tuberculosis in humans. First identified in 1882 by German bacteriologist Robert Koch, M. tuberculosis is unusual because of its lipid-rich cell wall and because it divides every 15 to 20 hours, when other bacteria divide in minutes. How long does it take E. coli to divide? Discuss