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In medicine, bacteriuria is "the presence of bacteria in the urine which is normally bacteria-free. These bacteria are from the urinary tract and are not contaminants of the surrounding tissues. Bacteriuria can be symptomatic or asymptomatic. Significant bacteriuria is an indicator of urinary tract infection."[1]


Sexually active young women with asymptomatic bacteriuria should not be treated with antibiotics.[2]

Among hospitalized patients, about one-third of patients with asymptomatic bacteriuria are unnecessarily treated.[3]


  1. Anonymous (2021), Bacteriuria (English). Medical Subject Headings. U.S. National Library of Medicine.
  2. Cai T, Mazzoli S, Mondaini N, Meacci F, Nesi G, D'Elia C et al. (2012). "The role of asymptomatic bacteriuria in young women with recurrent urinary tract infections: to treat or not to treat?". Clin Infect Dis 55 (6): 771-7. DOI:10.1093/cid/cis534. PMID 22677710. Research Blogging.
  3. Cope M, Cevallos ME, Cadle RM, Darouiche RO, Musher DM, Trautner BW (2009). "Inappropriate treatment of catheter-associated asymptomatic bacteriuria in a tertiary care hospital.". Clin Infect Dis 48 (9): 1182-8. DOI:10.1086/597403. PMID 19292664. Research Blogging.