BMJ Case Reports 2015; doi:10.1136/bcr-2015-210695

Streptococcus gordonii prosthetic joint infection in the setting of vigorous dental flossing

  1. Bharath Raj Varatharaj Palraj2
  1. 1Mayo Clinic Health System, Lacrosse, Wisconsin, USA
  2. 2Department of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
  1. Correspondence to Dr Ala S Dababneh, Dababneh.ala{at}
  • Accepted 27 July 2015
  • Published 11 August 2015


A 65-year-old woman with osteoarthritis, who underwent knee replacement 5 years prior, developed sudden onset knee pain and swelling. She had voluntarily starting a vigorous dental flossing regimen prior to the onset of symptoms. The patient underwent right knee arthrotomy, irrigation and debridement of right total knee arthroplasty and exchange of polyethylene with retention of the prosthesis. Intraoperative cultures grew Streptococcus gordonii. She was treated with 6 weeks of ceftriaxone and was later placed on oral antibiotic suppression.

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