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Table 1 Frequency of antibiotic resistance, virulence factors, and SCCmec types, in BSI collection of MRSA and MSSA strains

From: Regulation of virulence and β-lactamase gene expression in Staphylococcus aureus isolates: cooperation of two-component systems in bloodstream superbugs

Antimicrobial agent MRSA (n = 61) P # MSSA (n = 30) P #
R I S R I S  
Cefoxitin 61 0 0 0.004 0 0 30 0.025
Gentamycin 38 8 16 0.03 1 0 29 0.012
Erythromycin 19 16 6 0.03 0 0 30 0.025
Amikacin 11 18 32 0.12 0 0 30 0.025
Ciprofloxacin 33 12 16 0.021 0 0 30 0.025
Clindamycin 19 13 29 0.022 0 0 30 0.025
Chloramphenicol 8 16 37 0.65 7 0 23 0.65
Linezolid 8 19 34 0.040 0 0 30 0.025
Daptomycin 11 0 50 0.79 0 0 30 0.025
Penicillin 61 0 0 0.001 13 9 8 0.059
Gatifloxacin 40 11 12 0.025 9 1 20 0.025
Trimethoprim/sulfamethoxazole 11 0 50 0.82 0 0 30 0.025
MDR 56 0.051 4 0.95
XDR 24 0.072 0
PDR 8 0.22 0
SCCmec types
SCCmecI 10 0.019 0
SCCmecII 14 0.041 0
SCCmecIII 24 0.020 0
SCCmecIV 13 0.008 0
SCCmecV 10 0.045 0
Virulence factor genes
tst 19 0.021 0
etA 11 0.001 0
etB 5 0.071 0
lukS-PVL 19 0.035 0
lukF-PV 11 0.040 0
lukE-lukD 10 0.055 0
edinA 2 0.037 0
hla 10 0.111 0
hlb 13 0.018 0
hld 9 0.068 0
hlg 14 0.018 0
  1. S Susceptible, R Resistant, I Intermediate; #Statistical relationship between chi-square test between different variables with significant level ≤ 0.05