Case Report: A case study of geriatric acute cholecystitis complicated by coinfection with Shewanella putrefaciens and Enterococcus faecium

We documented the inaugural case of an elderly patient presenting with acute cholecystitis co-infected with <i>S. putrefaciens</i> and <i>E. faecium</i>. This case underscores the importance of integrating source control via PTGBD with targeted antimicrobial therapy guided by drug susceptibility testing, highlighting their synergistic role in effective management. Furthermore, the monitoring of procalcitonin (PCT) levels offers valuable support for clinical decision-making.