Introduction
The neutrophil-lymphocyte count ratio (NLCR) is an easy to analyse biomarker reacting very early in the course of acute inflammation. It has previously been reported to correspond to bacteremia and recently to disease severity in community-acquired pneumonia [1]. We have looked at 205 consecutive patients with Escherichia coli infections (ECI) and found the same to be true for ECIs. This may be of great clinical importance since E. coli is the most frequently isolated pathogen in patients with infections requiring in hospital care.