<prompt> XDR-TB is defined as:Resistance to at least INH rifampicin - other drugsResistance to any of the 3 first line drugsResistance to all 1st line drugs any 3 second line injectable drugsResistance to at least INH rifampicin any quinolones at least 1 injectable 2nd line drug  <response>: XDR -TB - resistant to - 1 INH rifampicin 2 Any fluoroquinolone 3 1 of 3 injectable drug Amikacin, kanamycin or Capreomycin MDR-TB - Resistance to INH Rifampicin. 