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Infect Immun. May 1997; 65(5): 1960–1961.
PMCID: PMC175252

Nutritional requirements for growth of uropathogenic Escherichia coli in human urine.


Enrichment with D-cycloserine was used to identify Escherichia coli auxotrophic mutants that exhibited limited growth in human urine. Bacterial synthesis of guanine, arginine, and glutamine was found to be required for optimal growth in urine. Mutants that required leucine, methionine, serine, phenylalanine, or proline also exhibited reduced growth in urine. Several other nutritional mutants, including nicotinamide auxotrophs, which are found frequently among cystitis isolates, exhibited normal growth in urine.

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Selected References

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