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Table 2 Pattern of drug resistance among 376 cultures positive retreatment cases, St. Peter’s TB specialized Hospital, 2011

From: Epidemiology of anti-tuberculosis drug resistance patterns and trends in tuberculosis referral hospital in Addis Ababa, Ethiopia

Pattern of drug resistance

Frequency

Percentage (%)

Any drug resistance

274

72.9

     INH1

211

56.1

     RIF2

175

46.5

     ETB3

162

43.1

     STM4

253

67.3

Single drug

71

18.9

    Mono INH Resistant

11

2.9

    Mono RIF Resistant

0

0

    Mono ETB Resistant

4

1.1

    Mono STM Resistant

56

14.9

Two drug

  

      INH + RIF

4

1.1

      INH + ETB

2

0.53

      INH + STM

15

4.0

      RIF + ETB

0

0

      RIF + STM

0

0

      ETB + STM

0

0

Three or more drug

  

   INH + RIF + ETB

2

0.53

   INH + RIF + STM

28

7.5

   INH + ETB + STM

12

3.2

   RIF + ETB + STM

0

0

  INH + RIF + ETB + STM

140

37.2

     MDR5

174

46

  1. 1INH = Isoniazid, 2RIF = Rifampicin, 3ETB,= Ethabutol, 4STM, = Streptomycin, 5MDR = Multi drug resistance (resistance at least INH and RIF).