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Table 2 Antimicrobials used, their symbols and inhibition zone size interpretation for Gram-negative enteric bacteria

From: Escherichia coli O157:H7: distribution, molecular characterization, antimicrobial resistance patterns and source of contamination of sheep and goat carcasses at an export abattoir, Mojdo, Ethiopia

Antimicrobial used a

Symbols

Diameter of zone of inhibition in mill meter

Resistant ≤

Intermediate

Moderately Susceptible

Susceptible ≥

Amoxicillin (25 μg)

AML

13

–

14–16

17

Bacitracin (10 μg)

B

14

15–16

–

17

Cefotaxime (5 μg)

CTX

14

–

15–22

23

Cefoxitin (30 μg)

FOX

14

–

15–17

18

Ceftazidime (10 μg)

CAZ

12

13–17

–

18

Cefuroxime Sodium(5 μg)

CXM

14

–

15–22

23

Clindamycine (10 μg)

DA

14

15–20

–

21

Cloxacillin (5 μg)

OB

13

–

14–16

17

Doxycycline (30 μg)

DO

13

–

14–16

17

Kanamycin (30 μg)

K

13

14–17

–

1

Nalidixic acid (30 μg)

NAL

13

14–18

–

19

Nitrofurantoin (300 μg)

F

13

14–17

–

18

Norfloxacin (10 μg)

NOR

12

13–16

–

17

Polymyxin B (300 unit)

Pb

8

9–11

–

12

Vancomycin (30 μg)

VA

14

15–16

–

17

  1. aall are Oxoid products (England)