Background: Infections following arthroplasty are one of the major risks during this type of surgery.
Case presentation: Four and half years after right hip arthroplasty surgery, the patient came back to our attention with pain at the same hip. The instrumental examinations showed signs of cup detachment and therefore, after carefully analyzing the case, we decided to perform a sterile aspiration of the hip in the operating room under C-arm fluoroscopy. Microbiological examinations showed positivity for E.Coli. The patient underwent to surgery to remove the prosthesis and implant a spacer. A therapy with Cefotaxim 2g 1-1-1 for 6 weeks was then set, after which a total arthroplasty was implanted. During this period, the Covid-19 pandemic occurred and therefore the patient performed two nasal-throat swabs, both negative. However, one week after the final surgery, respiratory conditions worsened and we performed a chest X-ray and CT scan, with suggestive images of ground-glass opacification patterns (GGO). Due to the clinic and the characteristic images of the instrumental examinations, the patient was transferred to the observation ward, waiting for the response of two additional swabs, also negative. The patient was then transferred to the ward for patients with typical symptoms of Covid-19 but with negative swabs for two weeks and subsequently discharged at home.
Conclusion: Despite the concomitant Covid-19 pandemic, the guidelines in case of periprosthetic hip infection further confirm the correct management of the patient.