A 22-year-old Hispanic male presents to the ER for evaluation of a fever of 103°F, abdominal pain, and diarrhea of three days’ duration. His CBC is concerning for a WBC count greater than 50,000/ μl,...

A 22-year-old Hispanic male presents to the ER for evaluation of a fever of 103°F, abdominal pain, and diarrhea of three days’ duration. His CBC is concerning for a WBC count greater than 50,000/ μl, with a marked increase in band cells, while his platelet and RBC counts are within normal limits. What is the most likely explanation of his elevated WBC count?

A. Leukemoid reaction

B. Acute myelogenous leukemia

C. Neutropenia

D. Acute lymphocytic leukemia