Rapidly progressive glomerulonephritis accompanying Legionnaires' disease.

A rapidly progressive, crescentic glomerulonephritis with acute oliguric renal failure occurred simultaneously with legionnaires' disease (LD) in a 52-year-old man. The diagnosis of LD was based on a sixfold rise in indirect fluorescent antibody titer against Legionella pneumophila serogroup 4. Treatment with erythromycin lactobionate resulted in a clinical resolution of pulmonary manifestations. The impairment of kidney function, however, was progressive and within two weeks led to end-stage renal failure requiring regular hemodialysis. This observation suggests that LD may trigger severe acute glomerulonephritis.