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Rapid Succession of Multidrug-Resistant Bacteremia and Candidemia in a Patient with Refractory Pemphigus Vulgaris: A Lethal Therapeutic Challenge

Li L, Jiang C

Infection and drug resistance, 2026

Abstract

Background: Immunosuppressed patients with extensive skin barrier disruption face extraordinary risks for polymicrobial infections. The rapid, sequential emergence of multidrug-resistant (MDR) bacteremia and candidemia in such hosts constitutes a particularly lethal complication with limited therapeutic options.

Case presentation: We report a 74-year-old woman with refractory pemphigus vulgaris (PV), type 2 diabetes mellitus, and chronic obstructive pulmonary disease who developed a cascade of MDR infections over a 14-day hospitalization. Following initial methicillin-resistant Staphylococcus aureus (MRSA) skin colonization, she developed Serratia marcescens bacteremia, subsequently complicated by wound superinfection with carbapenem-resistant Acinetobacter baumannii (CRAB) and multiple Candida species, including the rare yeast Kodamaea ohmeri. Despite sequential antimicrobial escalation-from piperacillin-tazobactam/linezolid to meropenem/amikacin, and finally caspofungin-her condition deteriorated with diabetic ketoacidosis, culminating in the family's decision to pursue discharge with comfort care based on the patient's previously expressed wishes; she died three days later. K. ohmeri demonstrated reduced fluconazole susceptibility (MIC = 8 µg/mL), highlighting the diagnostic and therapeutic challenges posed by emerging fungal pathogens.

Conclusion: This case starkly illustrates the catastrophic potential of rapid, sequential MDR infections in profoundly immunocompromised…

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