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Table 1 Minimum inhibitory concentration (MIC) for first-line drugs compared to Bactec MGIT results (N = 22 isolates)

From: Application of quantitative second-line drug susceptibility testing at a multidrug-resistant tuberculosis hospital in Tanzania

Drug and MIC result

MGIT susceptible

MGIT resistant

Accuracy

Isoniazid

  

95.5%

MIC Susceptible

4

0

 

MIC Resistant

1

17a

 

Rifampin

  

90.9%

MIC Susceptible

8

1b

 

MIC Resistant

1

12c

 

Streptomycin

  

90.9%

MIC Susceptible

13

0

 

MIC Resistant

2

7

 

Ethambutol

  

59.1%

MIC Susceptible

11

1e

 

MIC Resistant

7f

2

 
  1. aAll with isoniazid MIC ≥ 4 μg/ml. bRifampin MIC of 1 μg/ml. cAll with rifampin MIC >16 μg/ml. eEthambutol MIC of 4 μg/ml. fFive (71%) with ethambutol MIC of 8 μg/ml.