This site is intended for healthcare professionals

Go to /sign-in page

You can view 5 more pages without signing in

Organisms in UTIs

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

In acute uncomplicated infection, the organisms are those normally colonising the perineum:

  • E. coli - 65 to 80% of all UTIs
  • Proteus
  • Klebsiella
  • Enterobacter
  • Candida
  • Enterococci
  • Staphylococci - especially, Staph. saprophyticus in young, fit adults, especially women

In complicated UTI’s, more unusual organisms are found - such as:

  • Pseudomonas aeruginosa
  • Staphylococcus epidermidis
  • Klebsiella
  • Enterobacter
  • Proteus
  • Enterococcus (1)

Occasionally, organisms secondary to systemic disease arising elsewhere - such as:

  • Tuberculosis
  • Salmonellosis

Rarely, viruses:

  • adenovirus types 2 and 11, in children
  • Herpes simplex

In sexually active young men and women infection with Chlamydia trachomatis should be considered (2).

Reference:

Create an account to add page annotations

Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.