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Abstract
SUMMARY: 169 strains of Klebsiella pneumoniae and 68 strains of Cloaca cloacae were used in an examination of Hajna & Damon’s hippurate test and various modifications of it. The addition of a pH indicator (phenol red) to the medium enabled hydrolysis to be detected by a change of colour. Clear-cut distinction between K. pneumoniae and C. cloacae was not obtained with any method, but the indicator medium gave the best results and was simplest.
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© Society for General Microbiology, 1957