Probiotics in the Prevention of Recurrent Prosthetic Joint Infection of the Hip and Knee

Prosthetic joint infection (PJI) is one of the most devastating complications following total joint arthroplasty (TJA) of the hip and knee. Standard of care (SOC) treatment includes surgery and antimicrobials. Morbidity and mortality remain high despite contemporary treatments. The human body is colonized by billions of organisms, collectively, the microbiome, which is central to healthy immune function. Microbiome disruption, dysbiosis, can impair the immune response to infection. Despite recent evidence that suggests dysbiosis may be implicated in PJI, the role of probiotics in the treatment of PJI is unknown. Perioperative probiotics have been demonstrated to be safe and effective for infection prevention in abdominal surgery. The investigators hypothesize that perioperative probiotics will reduce re-infection in patients treated for PJI. A multi-centered, randomized controlled trial (RCT) at two academic, tertiary care centers will be conducted to determine the impact of probiotics on recurrent infection following treatment for PJI. Controls will receive SOC; study patients will receive a probiotic, started shortly after the initiation of and for the duration of their antibiotic therapy + 7 days, in addition to SOC. Primary outcome is re-operation for recurrent infection within 1 year.