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Table 1 Inhibitory effect of selected chemical agents on clinical isolates of Potential skin contaminants

From: Evaluating decontamination protocols for the isolation of Mycobacterium ulcerans from swabs

Chemical agents In-vitro resistance of microbes to chemical agentsa Test plates showing no growth, n (N = 70) Estimated activity levels of chemical agents (%)
0.5% PI None of the microbes tested 68 97
1% PI None of the microbes tested 70 100
1% CPC/2% NaCl E. coli, P. aeruginosa & S. typhi 65 92
2% CPC/4% NaCl None of the microbes tested 67 95
5% Oxalic acid B. cereus & A. niger 64 91
10% Oxalic acid None of the microbes tested 67 96
0.5% Virkon A. niger 67 96
1% Virkon None of the microbes tested 67 96
20% BC (Timsen) P. aeruginosa, B. cereus & A. niger 60 86
40% BC (Timsen) P. aeruginosa & A. niger 63 90
  1. PI Povidone iodine, CPC Cetyl pyridinium chloride, NaCl Sodium chloride, BC Benzalkonium chloride
  2. aTest microbes were P. aeruginosa, S. typhi, E. coli, Bacillus cereus, S. epidermidis, S. aureus, K. pneumonia, A. niger and C. albicans. % = n/N × 100