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Table 3 In vitro antimicrobial resistance pattern of CTX-M-positive Gram-negative isolates

From: Prevalence and antibiotic susceptibility pattern of CTX-M type extended-spectrum β-lactamases among clinical isolates of gram-negative bacilli in Jimma, Ethiopia

Species CTX-M positive isolate % resistance
PI PIT CTX CAZ CPM AT IMP MRP AK HLG TOB CIP MOX FO TGC CL COT
E. coli (n = 13) 100 30.8 92.3 92.3 92.3 92.3 0 0 7.7 76.9 76.9 92.3 84.6 7.7 0 7.7 84.6
K. pneumoniae (n = 30) 100 60 100 96.7 96.7 96.7 0 0 0 90 96.7 66.7 80 0 0 0 93.3
E. cloacae (n = 9) 100 0 100 100 100 100 0 0 0 88.9 88.9 22.2 77.8 0 0 0 100
M. morganii (n = 3) 100 0 100 100 100 100 0 0 0 100 100 66.7 100 100 IR IR 100
P. mirablis (n = 4) 100 0 100 100 100 100 0 0 0 100 100 25 25 50 IR IR 75
P. stuartii (n = 2) 100 0 100 100 100 100 0 0 0 IR IR 50 50 50 IR IR 100
K. oxytoca (n = 2) 100 50 100 100 100 100 0 0 0 100 100 0 50 0 0 0 100
E. hermanii (n = 1) R R R R R R S S S R R R R S S S R
Total Enterobacteriaceae (n = 64) 100 35.9 98.4 96.9 96.9 96.9 0 0 1.6 89.1 92.2 59.4 75 10.9 14.1 15.6 92.2
P. aeruginosa (n = 3) 66.7 66.7 IR 33.3 66.7 66.7 0 0 33.3 66.7 66.7 100 100 100 IR 0 IR
A. faecalis (n = 1) R S IE IE IE R S S S S S IE S IE IE IE IE
Total GNB (n = 68) 98.5 36.8 97.1 92.6 94.1 95.6 0 0 2.9 88.2 91.2 60.3 76.5 14.7 17.6 14.7 91.2
  1. Key: PI piperacillin, PIT piperacillin/tazobactam, CTX cefotaxime, CAZ ceftazidime, CPM cefepime, AT aztreonam, IMP imipenem, MRP meropenem, AK amikacin, HLG gentamicin, TOB tobramycin, CIP ciprofloxacin, MOX moxifloxacin, FO fosfomycine, TGC tigecycline, CL colistin, COT trimethoprim/sulfamethoxazole
  2. n number of isolates, S sensitive, R resistant, IR intrinsic resistance, IE insufficient evidence