Microaerophilic/anaerobic bacteria as a cause of urinary tract infection in pregnancy.

The involvement of microaerophilic/anaerobic bacteria as a cause of urinary tract infection was investigated by appropriate culture of urine samples obtained after periurethral toilet from 48 pregnant women admitted to hospital with urinary tract symptoms. Significant bacterial counts were demonstrated in 28 of these patients; 24 were due to microaerophilic/anaerobic organisms, and the remaining four were due to established urinary pathogens. In 25 pregnant women admitted without urinary tract symptoms, who were used as controls, four had significant bacterial counts, all of which were due to microaerophilic/anaerobic organisms. It is concluded that these organisms may be responsible for urinary tract symptoms in pregnant women when no significant growth is demonstrated on urinary culture by conventional methods.