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Asymptomatic urinary tract infection caused by Shigella sonnei.

The first case of asymptomatic urinary tract infection caused by Shigella sonnei in a patient, a 74-yr-old man, who was not a faecal carrier and had no history of dysentery is reported. Treatment with pivmecillinam 400 mg 3 times daily for 14 days was instituted and the bacteria were eradicated. The time and source of infection is unknown.