Case Report: Kingella kingae causing prosthetic joint infection in an adult

• Published in: Access microbiology Vol. 5; no. 8
• Main Authors: Wensley, Katherine, McClelland, Damian, Grocott, Natalie, Manoharan, Gopikanthan, Desai, Seema
• Format: Journal Article
• Language: English
• Published: Microbiology Society 09.08.2023
• Subjects: Case Reports
• ISSN: 2516-8290; 2516-8290
• DOI: 10.1099/acmi.0.000559.v3

Introduction. Kingella kingae is a Gram-negative micro-organism that is rarely isolated as a pathogen in the adult population. Although widely reported to affect prosthetic heart valves, there have been no previously reported cases of K. kingae infecting prosthetic joints in adults. Case Presentation. A 61-year-old patient with a history of rheumatoid arthritis presented with insidious onset of pain and swelling in her right shoulder, which had progressed to a discharging sinus. The patient had undergone a total shoulder replacement 11 years previously and had not developed any prior post-operative infections. She had been taking anti-TNF medication for 5 years prior to review for her rheumatoid disease. The patient underwent a two-stage revision replacement procedure, including implant removal, sinus excision and debridement. Deep tissue samples grew K. kingae post-operatively. The patient was commenced on intravenous ceftriaxone for 14 days, followed by a further 28 days of oral ciprofloxacin. A second-stage custom shoulder replacement was undertaken 10 months following the first stage and the patient made a good functional recovery. Conclusion. The authors suggest that clinicians should be attuned to K. kingae as a potential pathogen for prosthetic joint infection, particularly in patients who are immunosuppressed. Two-stage revision procedures can ensure a favourable outcome and eradication of this pathogen from the joint. Beta lactams remain the principal antibiotic of choice.