An 81-year-old female with fever, anterior chest pain and relative bradycardia due to Legionella longbeachae serogroups 1 and 2 pneumonia is reported. The diagnosis was made serologically by indirect fluorescent antibody test and enzyme-linked immunosorbent assay. Legionella could not be isolated from the patient, but the patient has been successfully treated with erythromycin.
Legionella longbeachae serogroups 1 and 2 have been only rarely recognized as the agent of legionellosis, in five U.S. patients and one Canadian patient, and this is the first case of Legionella longbeachae pneumonia in Japan.
