Bactericidal Effects of Disinfectants Against Pseudomonas

Abstract

Bactericidal effects of five disinfectants were evaluated in terms of phenol coefficient. In the study, several strains of Pseudomonas aeruginosa, P. maltophilia, P. cepacia and Achromobacter xylosoxidans were used. Bactericidal activities of phenol, saponated cresol solution and povidone iodide solution were not so strong, but the range of difference of phenol coefficients by strain was limited. 10% benzethonium chloride solution and 5% chlorhexidine solution generally showed stronger activity than the remaining three disinfectants. But the bactericidal effect of the two solutions varied depending upon the strains of the organisms.Chlorhexidine solution in the currently prevailing concentration was found to be ineffective against P. cepacia.