Invasive Group A Streptococcal Meningitis Following COVID-19 Infection Complicated by Multisystem Inflammatory Syndrome: A Case Report

We present a case of a 60-year-old woman who developed invasive group A streptococcal (GAS) meningitis following a COVID-19 infection, complicated by multisystem inflammatory syndrome (MIS). Initially diagnosed with COVID-19 based on fever, nasal obstruction, cough, and sore throat, her symptoms improved with symptomatic treatment, except for a persistent sore throat. She later presented with hematemesis and was found to have bacterial pneumonia and dehydration. Despite treatment with ceftriaxone, her condition worsened with the development of a headache, shivering, and worsening respiratory and circulatory symptoms. Cerebrospinal fluid analysis confirmed bacterial meningitis, and treatment was escalated to include ceftriaxone, ampicillin, and vancomycin. An MRI revealed a parapharyngeal space abscess, and subsequent blood cultures identified GAS as the causative organism. The patient was treated with ampicillin for 14 days, followed by oral amoxicillin. Her condition improved, and she was discharged with no neurological deficits. This case underscores the need for vigilance in detecting secondary bacterial infections in post-COVID-19 patients, especially in MIS, where atypical presentations can delay diagnosis. Early recognition and aggressive treatment are vital to preventing complications and ensuring favorable outcomes.