Serratia marcescens Cellulitis: A Case Report and Review of the Literature:

Atypical Stroke-Like Presentation in a Critically-Ill Patient With Serratia marcescens Bullous Cellulitis

Skin and soft-tissue infections are common in critically ill patients, especially with gram-positive bacteria such as Streptococcus or Staphylococcus species. However, it is imperative to consider gram-negative infections in atypical presentations of bullous cellulitis, where patients do not initially respond to common empiric therapy for skin infections. Serratia marcescens is a gram-negative organism that manifests in nosocomial settings due to its affinity for moisture-rich environments. This bacteria is often difficult to treat due to extensive antibiotic resistance, and thus treatment is generally catered towards culture sensitivity. Rarely, this bacteria is an infective agent of infective endocarditis. We present a case of a 44-year-old gentleman who presented with stroke-like symptoms and was found to have bullous cellulitis with deep wound cultures growing S. marcescens. This case report highlights an atypical, severe presentation, and aims to provide a literature review of this rare manifestation of S. marcescens in skin and soft-tissue infections. We intend to improve rapid diagnosis and proper treatment for future critically-ill patients with skin and soft-tissue infections. 

Serratia marcescens Bullous Cellulitis in a Splenectomized Patient: A Case Report and Review of the Literature

Serratia marcescens is a Gram-negative bacillus belonging to the Enterobacteriaceae family. Cutaneous infection with Serratia is rare, and usually occurs in immunocompromised individuals. Primary cutaneous infections are uncommon, but they are typically severe and are associated with significant morbidity and mortality. The pathogenetic factors leading to S. marcescens infection are not fully understood, but contributing virulence factors include proteases, secreted exotoxins, and the formation of biofilm. We report a case of cellulitis occurring in a splenectomized patient, which led to multiple wound debridements and a transmetatarsal amputation. This dramatic case led us to review the published literature on soft tissue infections caused by S. marcescens.

Rapidly progressive soft tissue infections

Skin and soft tissue infections are among the most common reasons for people to seek medical advice. They also represent one of the most common indications for antimicrobial therapy and account for approximately 7-10% of hospitalisations in North America. Although non-limb and non-life threatening infections may be treated on an out-patient basis with oral antibiotics, patients with more serious acute skin and soft tissue infections may require admission to hospital for management; this decision is especially true if the infection is rapidly progressive. We provide a concise overview of the differential diagnosis and approach to management of community-acquired rapidly progressive skin and soft tissue infections.