<s>[INST] What is drug-resistant TB? [/INST] Drug-resistant TB (DR-TB) and multidrug-resistant TB (MDR-TB) arise when a strain of the tuberculosis-causing bacteria is resistant to one or more of the medicines used to treat TB. DR-TB can occur through many ways, including but not limited to poor quality drugs, incorrect medical practices and premature termination of treatment. DR-TB is treatable, but options are limited and expensive, especially in low- and middle-income countries. Learn more here. Source: Stop TB. Link: https://www.stoptb.org/who-we-are/frequently-asked-questions. Field: Lung Disease. Disease: Tuberculosis </s>