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Microorganism MIC50sort
(μg/ml)		 MIC90sort
(μg/ml)		 Rangesort
(μg/ml)		 Reference
Citrobacter freundii - - 87 － ? 1132
Citrobacter freundii (3757 + β-lactamase positive) - - 64 － ? 1481
Citrobacter freundii (Basal amp(C)) - - 0.03 － ? 652
Citrobacter freundii (ceftazidime-resistant) >- >16 ? － ? 1358
Citrobacter freundii (ceftazidime-susceptibl) - 0.5 ? － ? 1358
Citrobacter freundii (Hyperproducing amp(C)) - - 32 － ? 652
Citrobacter freundii (Inducible amp(C)) - - 0.06 － ? 652
Citrobacter koseri 0.06 0.25 ≤0.06 － 0.5 462
Citrobacter koseri 0.25 0.25 ≤0.25 － 2 371
Citrobacter koseri 0.25 32 ≤0.25 － >32 412
Citrobacter spp. 0.25 32 ≤0.25 － >32 412
Citrobacter spp. - - <=1 － >64 1481
Citrobacter werkmanii - - >64 － ? 1481
Clostridium bifermentans - - 0.25 － ? 1474
Clostridium bifermentans (NCTC 06800) - - 0.25 － ? 1477
Clostridium cadaveris - - 4 － ? 1474
Clostridium clostridioforme - - 64 － ? 1474
Clostridium clostridioforme (NCTC 11224) - - 4 － ? 1477
Clostridium difficile 32 64 16 － 128 1479
Clostridium difficile 64 64 32 － 128 1474
Clostridium difficile 64 >128 8 － >128 1477
Clostridium difficile (GAI 10029) - - 32 － ? 1477
Clostridium innocuum 16 - 8 － 16 1474
Clostridium paraputrificum - - 4 － ? 1474
Clostridium paraputrificum (ATCC 25780) - - 4 － ? 1477
Clostridium perfringens 0.125 1 <=0.03 － 2 1477
Clostridium perfringens 1 4 1 － 8 1479
Clostridium perfringens 2 4 <=0.125 － 4 1474