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Read your prob, in case of pulmonary TB , course of treatment is for 9 month.if patient take drugs regularly for 9 month then it is cured. in pulmonary TB medicine does not take more then 9 month. so if your mom has taken drugs regularly for 9 month ,get CBC,ESR
, . if onces TB lesion appeare in lungs then they persist for life long, it does not means that TB is not cured.