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Legionnaires disease presenting as acute kidney injury in the absence of pneumonia. Legionnaires disease is a pneumonic illness with multisystem involvement. In 1987, Haines et al reported the only reported case of isolated renal disease of legionellosis without concurrent respiratory disease. A 62-year-old man presented with generalised weakness and malaise and watery diarrhoea, and was found to have acute kidney injury on admission. He was initially managed as acute gastroenteritis complicated with dehydration and acute kidney injury with intravenous hydration. Despite adequate hydration, his renal function was worsening day by day. Later in the course of his sickness he developed pneumonic illness and was diagnosed with Legionnaires disease after a positive urine antigen test. We are reporting the second case of Legionnaires disease presenting as an isolated acute kidney injury in the absence of respiratory symptoms on presentation.