Blood of patients with a predominance of Klebsiella pneumoniae have the same detection power as their cerebrospinal fluid. A sankey diagram showing the flows of patient subgroups. All patients in PB_green (n = 9, 100%) were present in PC_blue (n = 22), which was dominated by K. pneumoniae. Most children with meningitis with a predominance of Escherichia coli (n = 13) in PB_red (n = 17, 76.47%) were assigned to the PC_blue (n = 22) and PC_purple subgroups (n = 2). Four cases in PB_red (n = 17, −23.53%) were assigned to PC_green, whose primary species was K. pneumoniae.