Medicine XDR-TB is defined as: A Resistance to at least INH & rifampicin +/- other drugs B Resistance to any of the 3 first line drugs C Resistance to all 1st line drugs & any 3 second line injectable drugs D Resistance to at least INH & rifampicin + any quinolones + at least 1 injectable 2nd line drug 💡 Explanation XDR-TB is defined as: ✓ Correct Answer: D. Resistance to at least INH & rifampicin + any quinolones + at least 1 injectable 2nd line drug