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. 2012 Mar 7;141(1):153–157. doi: 10.1017/S0950268812000337

Table 1.

Antibiotic susceptibility profile of major Singaporean hospital MRSA clones

Sequence type SCCmec No. of isolates tested Vancomycin (MIC50/90 mg/l) Gentamicin (MIC50/90 mg/l) Erythromycin (MIC50/90 mg/l) Clindamycin (MIC50/90 mg/l) Ciprofloxacin (MIC50/90 mg/l) Cotrimoxazole (MIC50/90 mg/l)
5 IV 7 Susceptible (1/−) Susceptible (0·5/−) Variable (⩾32/−) Susceptible* (0·125/−) Resistant (⩾16/−) Resistant (⩾32/−)
22 IV 183 Susceptible (0·5/1) Susceptible (0·25/0·5) Variable (⩾32/ ⩾ 32) Susceptible* (0·125/0·25) Resistant (⩾16/ ⩾ 16) Susceptible (⩽0·25/ ⩽ 0·25)
30 IV 8 Susceptible (0·5/−) Susceptible (0·5/−) Susceptible (0·25/−) Susceptible (0·125/−) Susceptible (0·5/−) Susceptible (⩽0·25/−)
45 IV 28 Susceptible (0·5/1) Variable (⩾32/ ⩾ 32) Variable (⩾32/ ⩾ 32) Variable* (0·125/ ⩾ 16) Resistant (⩾16/ ⩾ 16) Variable (⩽0·25/16)
239 III 256 Susceptible (1/1) Resistant (⩾32/ ⩾ 32) Resistant (⩾32/ ⩾ 32) Variable* (⩾16/ ⩾ 16) Resistant (⩾16/ ⩾ 16) Resistant (⩾32/ ⩾ 32)
*

Isolates susceptible to clindamycin via minimum inhibitory concentration (MIC) criteria possess inducible resistance to the drug on disk diffusion testing.