A nosocomial case of Legionella pneumophila pneumonia likely caused by a serogroup 3 strain was detected by a urinary antigen test in Spain in 2018. Although Legionella bacteria could not be isolated from respiratory samples, molecular methods implicated the sink faucet of the patient's room as the probable infection source.
Keywords: Legionella pneumophila; Legionnaires’ disease; Spain; UAT; bacteria; bacterial infections; nosocomial infections; pneumonia; respiratory infections; urinary antigen test.