In our center, anaerobic cultures are always taken from blood
and tissue at the time of surgery. In the absence of anaerobic
pathogens in our patients, we describe here monomicrobial E. coli
NF in 22% of NF cases in our hospital. We previously reported seven
cases of E. coli NF. All patients died during hospitalization.
Genotypic analysis was performed on four isolates from three
patients and demonstrated cytotoxic necrotizing factor (cnf1) in
three isolates from two patients.