UTI-causing microorganisms (mnemonic)

Last revised by Daniel J Bell on 13 Jun 2022

A mnemonic to remember the commonest micro-organisms responsible for urinary tract infections (UTIs) is:



  • K: Klebsiella spp.
  • E: Enterococcus faecalis / Enterobacter cloacae
  • E: Escherichia coli
  • P: Pseudomonas aeruginosa / Proteus mirabilis
  • S: Staphylococcus saprophyticus / Serratia marcescens

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