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Table 1 Efficacy of chlorhexidine-alcohol (CHG-ALC) versus povidone-iodine-alcohol (PVP-I-ALC) against aerobic and anaerobic flora at 2.5 and 30 min contact time; immediate and 3-h values

From: Comparison of the antimicrobial efficacy of povidone-iodine-alcohol versus chlorhexidine-alcohol for surgical skin preparation on the aerobic and anaerobic skin flora of the shoulder region

Preparation Contact time (min) Pre-values (log10) Immediate effect 3-h effect
RFa n (0 cfu)b RFa n (0 cfu)b
Aerobic values
CHG-ALC 2.5 2.26 ± 0.93 1.94 ± 0.91 13 1.74 ± 1.08 10
30 2.17 ± 0.73 2.17 ± 0.73 16 1.93 ± 0.92 13
PVP-I-ALC 2.5 2.55 ± 0.75 2.55 ± 0.75 16 2.25 ± 1.05 13
30 2.20 ± 0.87 2.11 ± 0.93 15 1.94 ± 1.11 13
Anaerobic values
CHG-ALC 2.5 3.99 ± 1.52 1.74 ± 1.24 6 1.46 ± 1.23 4
30 3.55 ± 1.52 1.38 ± 1.16 7 1.59 ± 1.85 7
PVP-I-ALC 2.5 4.24 ± 1.27 3.96 ± 1.46 12 2.14 ± 1.65 4
30 3.50 ± 1.40 3.14 ± 1.20 13 2.71 ± 1.36 10
  1. aMean reduction factor (RF) and standard deviation
  2. bNumber of volunteers with “0” cfu counts