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Table 1 Antibiotic disks used to test E. coli O157:H7 and their respective concentrations

From: Escherichia coli O157:H7 in Raw Meat in Addis Ababa, Ethiopia: Prevalence at an Abattoir and Retailers and Antimicrobial Susceptibility

№ Antibiotic disks

Disc code

Concentration

Diameter of zone of inhibition in millimeter (mm)

  

Resistant

Intermediate

Susceptible

  

 

1

Amikacin

AK

30 μg

14

15-16

17

2

Amoxycillin-Clavulanic acid

AMC

20/10 μg

13

14-17

18

3

Ceftriaxone

CRO

30 μg

14

15-17

18

4

Cephalothin

KF

30 μg

14

15-17

18

5

Chloramphenicol

C

30 μg

12

13-17

18

6

Ciprofioxacin

CIP

5 μg

15

16-20

21

7

Nalidixic acid

NA

30 μg

13

14-18

19

8

Streptomycin

S

10 μg

11

12-14

15

9

Tetracycline

TE

30 μg

11

12-14

15

10

Sulfamethoxazole - Trimethoprim

SXT

30 μg

10

11-15

16