%0 Case Reports %T Metagenomic Next-generation Sequencing May be a Tool for Timely Diagnosis of Seronegative and Primary Toxoplasma Infection After Allogeneic Hematopoietic Stem Cell Transplantation: A Case Report and Literature Review. %A Lv Q %A Cao Y %A Wang J %A Meng L %A Wang G %J Pediatr Infect Dis J %V 43 %N 2 %D 2024 Feb 1 %M 38190489 %F 3.806 %R 10.1097/INF.0000000000004170 %X We report a case of Toxoplasma gondii ( T. gondii ) antibody seronegativity in a 14-year-old boy with a primary infection of T. gondii after allogeneic hematopoietic stem cell transplantation for acute T-cell lymphoblastic leukemia who was rapidly diagnosed through metagenomic next-generation sequencing of peripheral blood as well as clinical manifestations. He was successfully cured with timely administration of trimethoprim-sulfamethoxazole due to early diagnosis.