Through the Haze of Hemorrhage: Unraveling Leptospirosis With Diffuse Alveolar Hemorrhage.

Leptospirosis is a zoonotic infection caused by Leptospira species, presenting with a wide spectrum of clinical manifestations ranging from mild febrile illness to severe multi-organ dysfunction, also known as Weil's disease. This case describes a patient with severe leptospirosis complicated by diffuse alveolar hemorrhage, acute kidney injury, hepatic dysfunction, and thrombocytopenia. The diagnosis was initially challenging due to negative serology in the early phase of the illness, but strong clinical suspicion led to a repeat Leptospira IgM positivity. Later, the diagnosis was confirmed with the microscopic agglutination test. The patient responded well to antibiotic therapy and supportive care, emphasizing the importance of clinical suspicion and repeat testing in severe cases of leptospirosis.