TABLE 3.
Comparison of disulfiram MIC50 and MIC90 values to other test agents against S. aureus
Variant (no. of strains)a | Test agentb | MIC (μg/ml) |
||
---|---|---|---|---|
MIC50 | MIC90 | Range | ||
VSSA (10)c | THM | 2 | 4 | 2 to 4 |
DSF | 8 | 16 | 8 to 32 | |
DDTC | 32 | 64 | 16 to >64 | |
OXA | 64 | >64 | ≤0.5 to >64 | |
VAN | 1 | 1 | 1 to 2 | |
VISA (10)d | THM | 2 | 4 | 2 to 8 |
DSF | 16 | 16 | 4 to 32 | |
DDTC | 32 | 64 | 16 to 64 | |
OXA | >64 | >64 | ≤0.5 to >64 | |
VAN | 4 | 8 | 4 to 8 | |
VRSA (10)e | THM | 1 | 2 | 1 to 2 |
DSF | 16 | 16 | 4 to 32 | |
DDTC | 32 | 32 | 8 to 64 | |
OXA | 256 | >256 | 128 to >256 | |
VAN | 256 | >256 | 64 to >256 |
VSSA, vancomycin-susceptible S. aureus (VAN MIC ≤ 2 μg/ml); VISA, vancomycin-intermediate S. aureus (VAN MIC = 4 to 8 μg/ml); VRSA, vancomycin-resistant S. aureus (VAN MIC ≥ 16 μg/ml).
THM, thiram; DSF, disulfiram; DDTC, diethyldithiocarbamate; OXA, oxacillin; VAN, vancomycin.
VSSA strains: MSSA (ATCC 25923, NCTC 8325); MRSA (C1999000193, CA-347, CM05, COL, JE2, N315, SA LinR #14, USA300-0114).
VISA strains: AR-215 to AR-224.
VRSA strains: 71080, AIS 080003, AIS 1000505, AIS 2006032, AIS 2006045, HIP11714, HIP11983, HIP13419, HIP14300, and HIP15178.