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Table 1 Overview of phenotypic resistance of MDR strains to first-line and second-line antituberculosis drugs

From: On the onset and dispersal of a major MDR TB clone among HIV-negative patients, Tunisia

Resistance

Number of strains (%)

Gene

Mutations conferring drug resistance

MDR

64 (94,18)

  

XDR

4 (5,88)

  

 + RIF

68 (100)

rpoB

S531L, V615M

 + EMB

68 (100)

embB

M306I

 + PZA

43 (63.23)

pncA

A-11C Q10H C42A G10P L4W *Indel_Gene_Pos 341 CGT/C *Indel_Gene_Pos 297 G/GC *Indel_Gene_Pos 29 CTGCACGTCGACG/C *Indel_Gene_Pos 342 A/AC

 + STM

68 (100)

gidB

R47W

 + INH

68 (100)

katG

S315T

 + ETO

4 (5.88)

fabG1

T-8C, C-15 T

 + AMG

4 (5.88)

rrs

A1401G

 + FQ

4 (5.88)

gyrB

D461H, G470C

 + PAS

0

  

 + CS

0

  
  1. EMB Ethambutol, PZA Pyrazinamide, STM Streptomycin, AMG Aminoglycosides (kanamycin, amikacin, capreomycin), ETO Ethionamide, FQ Fluoroquinolones, PAS Para aminosalicylic acid, CS Cycloserine, Indel_Gene_Pos Insertion-Deletion_Gene_Position