An otherwise healthy child has on his 1-year-old routine CBC the polymorphonuclear neutrophil shown below. Which of the following is an appropriate next step?
The finding of hyper-segmented neutrophils in the peripheral blood is one of the most useful laboratory aids in making an early diagnosis of folate deficiency. Serum folate levels become low in weeks with an inadequate dietary source.
Bone marrow aspiration
Begin oral iron therapy
Begin folic acid supplementation
Hemoglobin electrophoresis
Blood