A person is brought to the emergency room with constant high fever, extensive edema, low blood pressure, and petechiae. Which of the following may the person be suffering from? A. septicemiaB. infectious mononucleosisC. plagueD. brucellosisE. Lyme disease

The correct answer is option A. septicemia.

Explanation:

Septicemia is a blood infection by bacteria and their toxins. These bacteria toxins come from other parts of infection like skin or lungs into the bloodstream and travel to all over the body and can lead to organ dysfunction or death.

Septicemia is characterized by the symptoms includes fever, low blood pressure, petechiae, mental confusion, and extensive edema. So, according to the symptoms, the person is suffering from septicemia.

Thus, the correct answer is option A. septicemia.