454 There is No Decrease in 90-day Prosthetic Infection in Total Hip or Knee Arthroplasty Despite use of Antibiotic or Antiseptic Irrigation Solutions Compared to Normal Saline: A Michigan Arthroplasty Quality Collaborative Initiative Study

455 Timing from Admission to Debridement, Antibiotic and Implant Retention (DAIR) Affects Treatment Success in Total Knee Arthroplasty Prosthetic Joint Infection

456 C. difficile Infection Prior to Total Knee Arthroplasty Independently Increases the Risk of Prosthetic Joint Infection

457 Unsuspected Positive Intraoperative Cultures in Aseptic Revision Knee Arthroplasty – Prevalence, Management, and Infection-Free Survivorship

458 The CRP/Albumin Ratio is a Prognostic Indicator to Guide the Timing of Reimplantation in PJI