Abstract

Reproducible procedures suitable for routine analysis of small quantities of body fluids and culture media were developed by use of gas-liquid chromatography, heptafluorobutyric-anhydride derivatives, and electron-capture detectors. Proteus mirabilis was isolated from two clinical cases of bacteriuria, and the alkaline-extractable products elaborated by this organism in vivo were compared with those produced in vitro. N-nitrosodimethylamine, a potent carcinogen, was produced along with other amines by P. mirabilis in all urines tested (both in vivo and in vitro) and in cooked-meat medium. This compound was not produced in vitro by a strain of Escherichia coli tested on the same substrates. The significance of these findings was evaluated, with emphasis on the carcinogenic activity and toxicity of N-nitrosodimethylamine and on the use of gas-liquid chromatography as a tool for the diagnosis of urinary-tract disease.

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