[The infectivity of Enterococcus faecalis in experimental urinary tract infection in mice: II].

The infectivity of Enterococcus faecalis was compared with that of Escherichia coli in the urinary tract in mice. The infectivity of E. faecalis in normal mice was found to be equal to that of E. coli. The mice previously treated with cyclophosphamide, carrageenin or alloxan as the immunosuppressive drug, and restricted water supply, were more susceptible to enterococcal infection than non-treated ones. These data were confirmed with histological examinations. E. faecalis is a pathogenic organism in the urinary tract and therefore cautions should be given to the treatment in clinical practice.