The effect ofpH on the multiplication of a pseudomonad in chlorhexidine and cetrimide

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Abstract
Pseudomonas cepacia(Ps. multivorans) can become adapted to a 1 in 30 dilution of Savlon hospital concentrate in distilled water, and can multiply in it.The organism so adapted did not survive in Savlon of the same strength made with hard tap water (pH 7·2).This effect was due to the difference ofpH between the two solutions.At thepH of the distilled water solution (pH 6·0) Savlon also showed reduced activity againstProteus vulgaris,but activity againstPs. aeruginosawas not affected.