Abstract

Abstract Studies were conducted to determine the range of susceptibility of Pseudomonas to seven samples of commercial contact germicides. Tests were made by the official phenol coefficient method, 5.001-5.009. Ranges of resistance for Pseudomonas strains varied with the germicides tested and the concentration of germicide used. Chlorine in water supply systems showed a resistance range of 45-150 ppm to Pseudomonas organisms. Comparative studies were also conducted, using the dilution test method, on various strains of Pseudomonas to determine the effectiveness of disinfectants; strain PRD-10 proved to be the test strain of choice for determining the validity of Pseudomonicidal claims.

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