Legionella pneumonia commonly presents with which electrolyte abnormality?

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Multiple Choice

Legionella pneumonia commonly presents with which electrolyte abnormality?

Explanation:
Legionella pneumonia often presents with dilutional hyponatremia due to an SIADH-like state from the infection, causing inappropriate ADH release and water retention that lowers serum sodium. This euvolemic hyponatremia is a classic clue that helps distinguish Legionella from other pneumonias. Other electrolyte disturbances listed—hyperkalemia, hypernatremia, and hypocalcemia—are not typical features of Legionella pneumonia.

Legionella pneumonia often presents with dilutional hyponatremia due to an SIADH-like state from the infection, causing inappropriate ADH release and water retention that lowers serum sodium. This euvolemic hyponatremia is a classic clue that helps distinguish Legionella from other pneumonias. Other electrolyte disturbances listed—hyperkalemia, hypernatremia, and hypocalcemia—are not typical features of Legionella pneumonia.

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