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Table 3 Antimicrobial susceptibility patterns of STEC isolates

From: Characterization of antimicrobial susceptibility, extended-spectrum β-lactamase genes and phylogenetic groups of Shigatoxin producing Escherichia coli isolated from patients with diarrhea in Iran

Antibiotic Total (n = 174) ESBL– (n = 103) ESBL + (n = 71) P-value
R No. (%) I No. (%) S No. (%) R No. (%) I No. (%) S No. (%) R No. (%) I No. (%) S No. (%)
Cefotaxime 77 (44.3) 3 (1.7) 94 (54.0) 7 (6.8) 2 (1.9) 94 (91.3) 70 (98.6) 1 (1.4) < 0.001
Ceftazidime 49 (28.2) 20 (11.5) 105 (60.3) 5 (4.9) 3 (2.9) 95 (92.2) 44 (62.0) 17 (23.9) 10 (14.1) < 0.001
Piperacillin-tazo 1 (0.6) 11 (6.3) 162 (93.1) 5 (4.9) 98 (95.1) 1 (1.4) 6 (8.2) 64 (90.1) 0.298
Ertapenem 1 (0.6) 173 (99.4) 1 (1.0) 102 (99.0) 71 (100) 0.405
Imipenem 1 (0.6) 173 (99.4) 1 (1.0) 102 (99.0) 71 (100) 0.405
Ciprofloxacin 44 (25.3) 10 (5.74) 120 (69.0) 14 (13.6) 4 (3.9) 85 (82.5) 30 (42.4) 6 (8.2) 35 (49.4) < 0.001
Levofloxacin 42 (24.1) 3 (1.7) 129 (74.2) 10 (9.7) 2 (1.94) 91 (88. 4) 32 (45.1) 1 (1.4) 38 (53.5) < 0.001
Amikacin 1 (0.6) 6 (3.4) 167 (96.0) 3 (2.9) 100 (97.1) 1 (1.4) 3 (4.2) 67 (94.4) 0.429
Tetracyclines 100 (57.5) 4 (2.3) 70 (40.2) 44 (42.7) 3 (2.9) 56 (54.4) 56 (78.9) 1 (1.4) 14 (19.7) < 0.001
Ampicillin 119 (68.4) 5 (2.9) 50 (28.7) 49 (47.6) 5 (4.9) 49 (47.6) 70 (98.6) 1 (1.4) < 0.001
Trimethoprim-sulfa 104 (59.8) 70 (40.2) 43 (41.7) 60 (58.3) 61 (85.9) 10 (14.1) < 0.001
  1. R resistant, I intermediate, S sensitive, ESBL extended spectrum β-lactamase, STEC Shiga toxin‐producing Escherichia coli
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