Which combination of laboratory findings would be most consistent with acute high-level exposure to inorganic mercury (Hg2+)?

• A. Mercury elevated only in blood
• B. Proteinuria
• C. Both high mercury in blood and urine and proteinuria
• D. None of these

Answer: (C)

Acute high-level exposure to inorganic mercury primarily causes kidney injury, so labs will reflect both recent exposure and renal damage. Blood mercury rises with recent contact, while urine mercury increases as the body eliminates mercury, especially for inorganic forms that are cleared renally. The toxic effect on the kidneys often produces proteinuria from proximal tubule damage and increased permeability. So, finding high mercury levels in both blood and urine along with proteinuria best fits the scenario, as it shows ongoing exposure and the expected renal injury.