Prosthetic joint infection after total hip arthroplasty caused by Sneathia sanguinegens: A case report (CARE-complaint).

MEDICINE(2020)

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Abstract
Introduction: Sneathia sanguinegens(S sanguinegens)is a gram-negative rod-shaped bacterium mostly reported to cause a perinatal infection, and there are no reports ofS sanguinegensin prosthetic joint infection (PJI). The purpose of this report is to describe a very rare case of PJI after total hip arthroplasty (THA) caused byS sanguinegens. Patient concerns: A 79-year-old woman presented with right coxalgia, inability to walk, and a fever of 39 degrees C. She had undergone THA 28 years earlier for osteoarthritis of the hip. Diagnoses: The diagnosis was acute late-onset PJI, because blood tests revealed marked inflammatory reaction and computed tomography showed an abscess at the right hip joint; synovial fluid analysis resulted in detection of a gram-negative bacillus. Intervention: Surgical debridement with retention of the implant and antibiotic therapy was performed. Outcomes: One month after surgery, polymerase chain reaction (PCR) assay showed that the pathogen was 99.9% likely to beS sanguinegens. There has been no recurrence of infection or loosening of the implant in the 2 years since her surgery. Lessons: PCR should facilitate detection of previously unknown pathogens and potentially novel bacterial species.
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Key words
case report,polymerase chain reaction,prosthetic joint infection,Sneathia sanguinegens,total hip arthroplasty
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