Test Details: Drug susceptibility testing for Mycobacterium Tuberculosis from liquid MGIT culture is important for therapy guidance and surveillance of drug resistance. It is the most reliable method to determine antimicrobial resistance and susceptibility and has a good clinical correlation. Ethambutol is a bacteriostatic antimycobacterial drug, effective against Mycobacterium tuberculosis and some other mycobacteria. It prevents spread of tuberculosis infection to others.