Outbreak investigation of Serratia marcescens neurosurgical site infections associated with a contaminated shaving razors.

Background: Surgical site infection (SSI) is the most common healthcare-associated infection. We report an outbreak of neurosurgical site infections caused by Serratia marcescens after craniotomy in a tertiary care hospital.

Methods: Between August 6 and 21, 2018, five cases of early-onset SSI caused by S.