Case report: Francisella philomiragia bacteremia in a patient with acute lymphoblastic leukemia

Francisella philomiragia is a Gram-negative coccobacillus, which very rare human opportunistic pathogen causing pneumonia and systemic infection. It difficult to identify this bacterium through conventional Gram-staining biochemical methods due an amorphous Gram stain appearance after 24 h culture its relatively fastidious slow growth giving weak and/or delayed reactions in tests. often misidentified as other bacteria including Haemophilus spp., Pseudomonas aeruginosa , or Sphingomonas paucimobilis. False identification may delay the therapy of patients even endanger patient’s life. Here, we report case 34-year-old man with acute lymphoblastic leukemia infected by F. was almost misdiagnosed. This describes our patient To knowledge, first such reported China.