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. 2013 Jul 10;3(3):165–173. doi: 10.1016/j.jegh.2013.05.003

Table 3.

Results of antibiotic resistance results obtained by the VITEK 2 system and strain characterization by microarray. mecA is the methicillin resistance gene; blaZ, blaI, blaR are â-lactamase resistance genes; fosB is a resistance gene for phosphomycin and bleomycin; Q6GD50 is a putative gene for fusidic acid resistance; ermC is an erythromycin and clindamycin resistance gene; sat is a streptothricin resistance gene; far1 is a fusidic acid resistance gene; tetK is a tetracycline resistance gene. MLSB = inducible clindamycin resistance; PVL = Panton–Valentine leukocidin; tsst-1 = toxic shock syndrome toxin 1; agr = accessory gene regulator; EDIN-B = epidermal cell differentiation inhibitor B.

Strain Type No. of isolates (% of total; n = 29) VITEK® 2 Microarray


Antibiotic Resistance Antibiotic Resistance genes PVL TSST-1 Entero-toxins Remarks
CC5-MRSA-IV (Maltese Clone); agr group II 16 (55.2%) Oxacillin, Fusidic Acid, Streptogramins mecA, blaZ, blaI, blaR, fosB, Q6GD50 Neg Pos A, C, L, egc-cluster
1 (3.4%) Fusidic Acid, Streptogramins mecA, fosB, Q6GD50 Neg Neg A, egc-cluster
2 (6.8%) Fusidic Acid, Streptogramins mecA, blaZ, blaI, blaR, fosB, Q6GD50 Neg Pos A, C, L, egc-cluster
1 (3.4%) N/A mecA, blaZ, blaI, blaR, fosB, Q6GD50 Neg Pos A, C, L, egc-cluster
1 (3.4%) N/A mecA, blaZ, blaI, blaR, fosB, Q6GD50 Neg Neg A, ecg-cluster
CC22-MRSA-IV (Barnim/UK-EMRSA-15); agr group I 1 (3.4%) Oxacillin, Levofloxacin, Moxifloxacin, Fusidic Acid, Streptogramins, Vancomycin-intermediate mecA, blaZ, blaI, blaR, Q6GD50, ermC Neg Neg C, L, egc-cluster
1 (3.4%) Oxacillin, Levofloxacin, Moxifloxacin, Streptogramins mecA, blaZ, blaI, blaR, Neg Neg C, L, egc-cluster
1 (3.4%) Oxacillin, Levofloxacin, Moxifloxacin, Streptogramins mecA, blaZ, blaI, blaR, Neg Neg B, C, L, egc-cluster
2 (6.8%) Oxacillin, Levofloxacin, Moxifloxacin-intermediate, Streptogramins mecA, blaZ, blaI, blaR, Neg Neg B, C, L, egc-cluster
ST6-MRSA-IV (WA-MRSA-51); agr group I 1 (3.4%) Oxacillin, Erythromycin, Clindamycin, MLSB inducible mecA, blaZ, blaI, blaR, ermC; sat, fosB Neg Neg A
CC80-MRSA-IV; agr group III 1 (3.4%) Oxacillin, Tetracycline, Fusidic Acid, Streptogramins mecA, blaZ, blaI, blaR, aphA, sat, far1, tetK Neg Neg Neg Other toxins: exfoliative toxin D, EDIN-B
CC50 (New Strain); agr group IV 1 (3.4%) Oxacillin, Fusidic Acid, Streptogramins mecA, blaZ, blaI, blaR, Q6GD50 Neg Neg ecg-cluster