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Chronic infection
Presence of a protracted or persistent infection by a pathogen potentially related to an underlying abnormality of the immune system that is not able to clear the infection. [from HPO]
Drug-resistant tuberculosis
Tuberculosis disease caused by Mycobacterium tuberculosis isolate that is resistant to one or more of the antitubercular medications. [from MONDO]
Multidrug-resistant tuberculosis
Tuberculosis disease that is caused by a multidrug-resistant strain of Mycobacterium tuberculosis. [from NCI]
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