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. 2014 May 1;7(5):e10019. doi: 10.5812/jjm.10019

Table 1. Comparison of the Degree of Sensitivity and Resistance Rate of S. infantis by two Methods of Disk Diffusion and Micro Dilution Tube a, b.

Antimicrobial Agent MIC, µg/mL MIC, % DD, % P Value
Range MIC50 MIC90 R (N) R (N)
Nalidixic acid 512-2048 614 2048 100 (50) 100 (50) NS
Tetracycline 8-64 16 32 94 (47) 100 (50) NS
Streptomycin 64- > 1024 512 1024 86 (43) 100 (50) 0.0012
Chloramphenicol 8-256 64 128 72 (36) 64 (32) NS
Trimethoprim 512- > 2048 2048 > 2048 100 (50) 66 (33) > 0.001
Ceftazidime 0.01-8 0.5 1 20 (10) 28 (14) NS

a Abbreviations: DD, Method of Disk Diffusion; MIC, Minimum Inhibitory Concentrations Method; MIC50, minimal concentration, inhibits 50% of analyzed strains; MIC90, minimal concentration, inhibits 90% of analyzed strains; NS, not significant.

b Data are presented in No. (%).