Opportunistic infection by Serratia marcescens

Immunocompromised individuals sometimes have a considerably increased risk of opportunistic infections. Serratia marcescens is a Gram-negative bacterium that belongs to the Enterobacteriaceae family and was identified as the pathogen in this case in a 69-year-old woman with metastatic lung cancer who was undergoing chemotherapy and had various secondary diagnoses. After a week of antibiotic treatment, the patient’s condition improved and she was discharged from hospital.