Urinary tract infection caused by Haemophilus influenzae. A case report.

In a patient with frequent symptoms of urinary tract infection during the past 5 years and steadily deteriorating renal function, standard urine cultures were mostly negative. Following microscopy of freshly voided, gram-stained urine, culture on haematin agar plates incubated in 10% CO2 resulted in isolation of Haemophilus influenzae. Augmented culture procedures may identify the cause of symptoms in similar cases.