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. 2016 Jun 17;11(6):e0157757. doi: 10.1371/journal.pone.0157757

Table 4. Comparison of the efficacies of colistin combinations vs monotherapies after 24 and 48 h of treatmenta.

Strain NO. CST+MER VS CST CST+TIG VS CST CST+TIG VS TIG CST+FOS VS CST CST+FD VS CST CST+RIF VS CST CST+RIF VS RIF CST+SUL VS CST CST+SUL VS SUL
Δlogb P valuec Δlog P value Δlog P value Δlog P value Δlog P value Δlog P value Δlog P value Δlog P value Δlog P value
24h of treatment
AB-1 -2.05 0.006 -0.94 0.009 -0.56 0.253 -1.14 0.007 -2.78 0.006 -2.95 0.006 -2.61 0.009 -0.08 0.955 -0.94 0.013
AB-2 -2.11 0.005 -0.91 0.008 -0.07 0.589 -1.16 0.006 -2.14 0.005 -2.96 0.005 -2.64 0.015 -0.08 0.861 -1.12 0.007
AB-3 -3.02 <0.001 0.08 0.162 0.00 0.448 -1.25 <0.001 -2.93 <0.001 -3.02 <0.001 -2.59 0.004 -0.32 0.002 -1.31 0.006
AB-4 -2.88 0.007 -1.26 0.009 -1.39 0.008 -2.06 0.033 -2.70 0.007 -3.34 0.007 -2.46 0.005 -0.43 0.018 -1.43 0.009
AB-5 -3.09 0.010 -1.47 0.011 0.16 0.335 -1.18 0.012 -2.70 0.010 -4.18 0.010 -2.74 0.004 -1.19 0.012 -0.87 0.003
AB-6 -0.91 0.008 0.16 0.169 -0.02 0.844 0.20 0.066 -1.84 0.006 -2.29 0.006 -2.40 0.004 0.03 0.951 -1.29 <0.001
AB-7 -0.46 0.012 -0.44 0.014 0.04 0.973 -0.65 0.007 -2.40 0.003 -2.41 0.003 -2.86 0.021 0.04 0.706 -1.32 0.004
AB-8 0.02 0.969 -0.54 0.053 -0.17 0.153 -0.95 0.032 -1.88 0.025 -2.71 0.024 -2.54 0.010 -0.18 0.225 -1.27 0.005
AB-9 -0.20 0.211 -0.42 0.105 -0.02 0.625 -0.73 0.063 -1.56 0.041 -3.11 0.039 -4.32 0.086 0.45 0.047 -1.63 0.004
AB-10 -0.17 0.096 -0.43 0.028 -0.80 0.071 -0.70 0.013 -1.75 0.007 -2.55 0.007 -3.47 0.012 0.36 0.003 0.42 0.760
AB-11 -0.44 0.078 -0.13 0.654 -0.91 0.052 -0.98 0.019 -2.08 0.014 -2.82 0.014 -2.92 0.030 -0.03 0.834 -0.65 0.004
AB-12 0.12 0.446 -0.67 0.022 -0.31 0.288 -1.03 0.014 -1.41 0.012 -2.90 0.011 -3.71 0.001 -0.16 0.196 -1.36 0.001
48h of treatment
AB-1 -2.02 0.002 -0.67 0.009 -0.31 0.399 -0.50 0.012 -2.87 0.002 -2.83 0.002 -3.49 0.008 -0.26 0.050 -2.00 0.014
AB-2 -2.04 0.002 -0.69 0.004 -0.66 0.013 -0.45 0.003 -2.63 0.002 -2.73 0.002 -2.65 0.001 -0.01 0.795 0.17 0.142
AB-3 -2.59 0.020 -0.47 0.056 -1.69 0.002 -0.54 0.045 -2.54 0.019 -2.78 0.019 -4.83 0.007 0.16 0.447 -2.04 0.014
AB-4 -2.93 0.010 -0.90 0.054 -1.77 0.009 -0.05 0.500 -4.04 0.009 -3.80 0.009 -5.58 0.024 -1.21 0.002 -1.60 0.041
AB-5 -2.35 0.011 -0.45 0.027 -0.42 0.009 -0.16 0.233 -2.91 0.011 -3.15 0.011 -3.01 0.001 0.02 0.997 -1.24 <0.001
AB-6 -0.11 0.985 -0.25 0.243 -0.92 0.005 0.12 0.150 -2.56 0.001 -2.95 0.001 -2.85 0.005 0.01 0.867 -0.88 0.001
AB-7 0.21 0.086 -0.40 0.010 -0.31 0.017 -0.33 0.017 -2.36 0.004 -2.94 0.004 -2.87 0.009 -0.02 0.993 -1.49 0.032
AB-8 0.30 0.053 -0.27 0.747 -0.18 0.989 -0.75 0.008 -1.89 0.004 -3.10 0.004 -3.91 0.010 -0.15 0.182 -0.16 0.096
AB-9 -0.23 0.117 -0.33 0.029 -1.21 0.001 -0.34 0.015 -1.44 0.004 -3.04 0.004 -3.17 0.001 -0.34 0.017 -1.50 0.002
AB-10 -0.28 0.110 -0.13 0.087 -0.11 0.474 -0.70 0.003 -2.95 0.002 -2.94 0.002 -5.15 0.007 -0.14 0.313 0.54 0.515
AB-11 -0.09 0.566 -0.12 0.860 -1.95 0.002 -0.71 0.015 -2.49 0.008 -2.96 0.008 -2.87 0.004 -0.07 0.629 0.01 0.905
AB-12 -0.04 0.870 0.12 0.535 -1.49 0.007 -0.25 0.109 -1.59 0.017 -3.34 0.016 -2.97 <0.001 -0.12 0.283 -0.88 0.004

a CST, colistin; MER, meropenem; TIG, tigecycline; FOS, fosfomycin; FD, fusidic acid; RIF, rifampin; SUL, sulbactam.

b Δlog means the log10 recovered CFU of antibiotic combination therapy minus the log10 recovered CFU of monotherapy.

c A P value of < 0.05 indicates significance and is shown in bold.

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