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Table 1 Definitions used for the classification of drug susceptibility profiles of patients with rifampicin-resistant tuberculosis, Uganda, 2014–2018

From: Epidemiological profile of patients with rifampicin-resistant tuberculosis: an analysis of the Uganda National Tuberculosis Reference Laboratory Surveillance Data, 2014–2018

Variable

Definition

Rifampicin resistance (RR)

Resistance to rifampicin detected using phenotypic or genotypic methods, with or without resistance to other anti-TB drugs. It includes any resistance to rifampicin, in the form of monoresistance, polyresistance, MDR or XDR

Monoresistance

Resistance to one first-line anti-TB drug only (streptomycin, rifampicin, isoniazid, ethambutol, pyrazinamide)

Polydrug resistance

Resistance to more than one first-line anti-TB drug (other than both isoniazid and rifampicin)

Multidrug resistance (MDR)

Resistance to at least both isoniazid and rifampicin

Pre-extensively drug-resistant tuberculosis (Pre-XDR TB)

MDR-TB with resistance to fluoroquinolones (ofloxacin, levofloxacin and moxifloxacin) or a second-line injectable (amikacin, kanamycin, or capreomycin), but not both

Extensively drug resistant TB (XDR TB)

Resistance to isoniazid and rifampin plus resistance to any fluoroquinolone (ofloxacin, levofloxacin and moxifloxacin) and at least one of three injectable second-line drugs (i.e., amikacin, kanamycin, or capreomycin)