Psychrobacter sanguinis infection in a pediatric patient with craniopharyngioma identified in a blood culture by 16S rRNA sequencing

Psychrobacter species are gram-negative bacteria in the Moraxellaceae family. These bacteria are considered rare opportunistic human pathogens, and the infection sites include blood, cerebral spinal fluid, wounds, urine, the ears, and the eyes. Few cases of human infection by these species have been described previously. We report a case of a 10-year-old boy with postneurosurgical bacteremia due to Psychrobacter sanguinis infection. This infection was difficult to identify using routine biochemical phenotypical tests. Sequencing of 16S rRNA was performed to identify this pathogen. The patient was successfully treated with antibiotics. In conclusion, P. sanguinis infections are rare but should be considered when cultures remain negative for common pathogens.