ArticleBMC infectious diseases2026
Periorbital infections caused by Group A streptococci: a case series.
Article in BMC infectious diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundA surge in Group A streptococcus (GAS) infections has been described in the post-COVID-19 pandemic period. We reviewed cases with periorbital GAS infections at our institution during a 14-month period, including cases with necrotizing soft tissue infection (NSTI).
methodsA single center retrospective case series was performed at the University Hospital of Copenhagen, Rigshospitalet, during January 2023 to February 2024 including all adult patients referred from secondary centers with a suspicion of periorbital NSTI. All cases were treated for periorbital skin and soft tissue infections with culture-confirmed group A streptococci in an eye swab, a tissue sample or blood cultures.
resultsEleven cases with a median age of 72 (range 55-84) years with periorbital GAS infection were included. Four patients had diabetes, and one patient had eyelid surgery prior to the infection. Pre-admission symptoms included pain, swelling in the periorbital area, fever and/or a sore throat. Patients presented with fever, nausea, and/or confusion and clinical exams were noticeable for erythema and edema of the periorbital area with the eyelids fully closed on the affected side. Two cases had septic shock. Based on CT scans, six cases were diagnosed with pre-septal cellulitis and five cases were suspected of post-septal NSTI, which was confirmed by surgical debridement. The GAS isolates from tissue samples or blood cultures in these five cases were of type MLST 28 / emm 1.0 (M1 clone). Treatment included meropenem and clindamycin (n = 11), intravenous immunoglobulin (n = 4), surgical debridement (n = 5) and hyperbaric oxygen therapy (n = 3). One patient died in the intensive care unit. Two patients have permanently reduced visual acuity.
conclusionWe report an accumulation of cases with pre- or post-septal orbital GAS infections in which the majority had no evidence of immunosuppression or a triggering event such as trauma or surgery. All cases of invasive GAS infections were caused by the M1 clone.
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