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. 1975 May;1(5):483-5.
doi: 10.1128/jcm.1.5.483-485.1975.

Evaluation of tyrosine medium for the identification of Enterobacteriaceae

N K Sheth, V P Kurup

Evaluation of tyrosine medium for the identification of Enterobacteriaceae

N K Sheth et al. J Clin Microbiol. 1975 May.

Abstract

Use of the tyrosine medium in the identification of members of the family Enterobacteriaceae form the basis of this paper. Six hundred and twenty-three strains were tested for their property of tyrosine degradation. Three hundred and seventy-two strains were positive in 24 h and an additional eight strains were positive in 48 to 72 h. These positive strains consisted of all 344 strains of the Proteus-Providencia group, all 25 strains of Citrobacter diversus, and three strains of atypical C. freundii. Our findings suggest that tyrosine degradation is a useful property for separating out the Proteus-Providencia group and in specific identification of C. diversus.

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