Abstract
Introduction
Psychrobacter sanguinis is a rarely reported Gram-negative organism, usually linked to cold environments, but it is increasingly being recognized as an opportunistic pathogen.
Materials and methods
Two blood culture isolates from hospitalized patients in Limanowa, Poland, were identified using MALDI-TOF MS and confirmed with 16S rRNA sequencing. Antimicrobial susceptibility testing was conducted via the gradient diffusion method.
Results
Both P. sanguinis strains showed low MICs for fluoroquinolones, extended-spectrum cephalosporins, and carbapenems, suggesting possible treatment options.
Conclusion
These cases highlight the growing clinical importance of P. sanguinis. Reliable molecular identification and systematic research are necessary to understand its pathogenic potential, resistance determinants, and epidemiological impact.