Resistance phenotype designationa No. Isolateb Antibiogram (disk zone size, mm)c
      GM TM AN CAZ TE RA CIP IPM
Number of resistant strains (%) 21 (68) 22 (71) 17 (55) 31 (100) 13 (42) 13 (42) 4 (13) 27 (87)
French strains A 14 9 6 11 6 6 20 6 24
B 3 6 6 7 6 6 21 6 25
C 4 16 17 19 19 9 17 6 31
D 5 20 11 17 15 8 17 6 27
E 1 24 22 22 12 6 23 6 32
F 4 9 18 18 6 6 18 6 21
Number of resistant strains (%) 23 (74) 14 (45) 14 (45) 30 (98) 28 (90) 19 (61) 11 (36) 30 (98)
Tunisian strains a1 5 8 20 22 6 6 20 6 30
b1 4 8 18 20 6 6 20 18 28
c1 1 10 20 22 6 10 17 6 15
d1 1 12 20 14 18 18 17 17 22
e1 7 8 8 10 6 6 18 6 27
f1 4 6 6 6 6 6 18 6 8
g1 2 20 20 6 6 15 22 6 17
h1 2 16 6 22 13 12 6 6 30
i1 1 6 6 20 12 12 18 6 30
j1 1 26 23 25 6 6 6 6 10
k1 2 16 18 19 6 14 6 23 12
l1 1 25 25 25 21 20 22 32 35
aAntibiograms with a similarity coefficient of ≥0.9 were considered indistinguishable and were grouped together in a single resistance phenotype designation bNumbers of isolates cAntibiotics designations: GM, gentamicin; TM, tobramycin; AN, amikacin; CAZ, ceftazidim;TE, tetracycline; RA, rifampicin; CIP, ciprofloxacin; IPM, imipenem Diameter of the disk of antibiotic: 6mm
Table 1: The resistance phenotype patterns and their frequencies in the 2 population.