Which species has multiple forms of reticulocytes?

Which species has multiple forms of reticulocytes?

• A. Horses
• B. Cats
• C. Dogs
• D. Cows

Answer: (A)

Reticulocytes are immature red blood cells that still contain RNA and can be seen in peripheral blood when stained with a supravital stain. They come in two forms: aggregate reticulocytes, which show a network of RNA strands, and punctate reticulocytes, which display small RNA dots. In horses, both forms are present in circulating blood under normal conditions, so you can observe multiple forms of reticulocytes on a smear. This pattern is distinctive compared with other common domestic species, where one form may predominate or reticulocytes are less routinely seen unless there’s anemia. So, the presence of multiple reticulocyte forms in circulation is a characteristic feature in horses.

Reticulocytes are immature red blood cells that still contain RNA and can be seen in peripheral blood when stained with a supravital stain. They come in two forms: aggregate reticulocytes, which show a network of RNA strands, and punctate reticulocytes, which display small RNA dots. In horses, both forms are present in circulating blood under normal conditions, so you can observe multiple forms of reticulocytes on a smear. This pattern is distinctive compared with other common domestic species, where one form may predominate or reticulocytes are less routinely seen unless there’s anemia. So, the presence of multiple reticulocyte forms in circulation is a characteristic feature in horses.