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Microorganism MIC50sort
(μg/ml)		 MIC90sort
(μg/ml)		 Rangesort
(μg/ml)		 Reference
Citrobacter freundii - - 64 － ? 1329
Citrobacter freundii (3757 + β-lactamase positive) - - 64 － ? 1481
Citrobacter freundii (Basal amp(C)) - - 0.03 － ? 652
Citrobacter freundii (Europe) - 32 ? － ? 284
Citrobacter freundii (Hyperproducing amp(C)) - - 32 － ? 652
Citrobacter freundii (Inducible amp(C)) - - 0.06 － ? 652
Citrobacter freundii (North America) - 64 ? － ? 284
Citrobacter koseri 0.06 32 ≤0.06 － 128 497
Citrobacter koseri (Europe) - 0.5 ? － ? 284
Citrobacter koseri (North America) - 0.25 ? － ? 284
Citrobacter spp. - - <=1 － >64 1481
Citrobacter werkmanii - - 64 － >64 1481
Clostridium clostridioforme >32 >32 8 － >32 1460
Clostridium difficile 8 >64 ? － ? 1389
Clostridium difficile >32 >32 >32 － ? 1460
Clostridium difficile 128 256 64 － 256 1470
Clostridium difficile (Europe) - 64 ? － ? 284
Clostridium innocuum 8 16 8 － 16 1460
Clostridium innocuum - - 8 － ? 1470
Clostridium perfringens 8 >64 ? － ? 1389
Clostridium perfringens - - 4 － ? 1438
Clostridium perfringens (ATCC 13124) - - 4 － ? 1438
Clostridium perfringens (Europe) - 4 ? － ? 284
Clostridium perfringens (North America) - 8 ? － ? 284
Clostridium ramosum 1 2 1 － 4 1460
Clostridium ramosum - - 0.5 － ? 1470
Clostridium ramosum - - 0.5 － ? 1438
Clostridium sordellii - - 0.25 － 0.5 1470