A Case of Sepsis in Which Escherichia coli and Fastidiosipila sanguinis Were Isolated and Identified From a Blood Culture.

We isolated Fastidiosipila sanguinis for the first time in Asia, alongside Escherichia coli, from blood culture specimens in a case of complicated urinary tract infection with sepsis. In our case, F. sanguinis took 96 hours to form colonies under anaerobic culture and showed sensitivity to ceftriaxone, administered for the urinary tract infection. The pathogenicity and clinical significance of F. sanguinis, as well as its impact on the host when coinfected with other pathogens, require further analysis through the accumulation of cases.