A Septicemic Child due to a Novel Streptococcal Species, Streptococcus gwangjuensis.

We report a case of septicemia due to Streptococcus gwangjuensis 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. S. gwangjuensis was identified using sodA and gyrB amplicon-based next-generation sequencing. The isolate was susceptible to all β-lactam antibiotics.