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. Streptomycin belongs to class aminoglycoside and is widely used as a first line TB drug in patients that have previously been treated for TB. Streptomycin is added to first line regimens because patients that treated previously are more likely to have developed some drug resistance.