An initially unidentified case of urinary tract infection due to Aerococcus urinae

New Microbiol. 2017 Jul;40(3):221-222. Epub 2017 May 17.


Aerococcus urinae is a microorganism responsible for urinary tract and blood stream infections which are rarely reported in clinical practice. However, it has been proposed that the infrequency of such reports may be partially due to difficulties related to pathogen identification. We present here a case of an elderly male patient with urinary tract infection where A. urinae was initially not identified by a private microbiology laboratory. Our report highlights the need to consider A. urinae as a causative agent of urinary tract infections because if not identified and properly treated it may lead to endocarditis or septicemia.

Keywords: Aerococcus urinae; Trimethoprim-sulfamethoxazole; Urinary tract infection.

Publication types

  • Case Reports

MeSH terms

  • Aerococcus / drug effects
  • Aerococcus / genetics
  • Aerococcus / isolation & purification*
  • Aged, 80 and over
  • Amoxicillin / therapeutic use
  • Anti-Bacterial Agents / therapeutic use
  • Bacteriuria / microbiology
  • Diagnosis, Differential
  • Erythrocyte Count
  • Gram-Positive Bacterial Infections / diagnosis
  • Gram-Positive Bacterial Infections / drug therapy
  • Gram-Positive Bacterial Infections / microbiology*
  • Humans
  • Leukocyte Count
  • Male
  • Microbial Sensitivity Tests
  • RNA, Ribosomal, 16S / chemistry
  • RNA, Ribosomal, 16S / genetics
  • Urinary Tract Infections / drug therapy
  • Urinary Tract Infections / microbiology*
  • Urine / cytology
  • Urine / microbiology


  • Anti-Bacterial Agents
  • RNA, Ribosomal, 16S
  • Amoxicillin