Extensively Drug-Resistant Tuberculosis (XDR-TB): A form of TB that is resistant not only to first-line drugs but also some second-line drugs, making it even more difficult to treat.
Directly Observed Therapy (DOT): A strategy where healthcare providers directly observe patients taking their medication for TB treatment.
Latent Tuberculosis Infection (LTBI): When someone has been infected with TB bacteria but does not have active disease. Treatment for LTBI helps prevent progression into active TB.