A Septicemic Child due to a Novel Streptococcal Species, <i>Streptococcus gwangjuensis</i>

We report a case of septicemia due to <i>Streptococcus gwangjuensis</i> in an immunocompromised 8-year-old child. The final diagnosis was febrile neutropenia associated with acute myeloid leukemia and septicemia. The patient was successfully treated with chemotherapy, granulocyte colony-stimulating factor, leukodepleted packed red cell transfusions, piperacillin/tazobactam, and meropenem. <i>S. gwangjuensis</i> was identified using <i>sodA</i> and <i>gyrB</i> amplicon-based next-generation sequencing. The isolate was susceptible to all β-lactam antibiotics.