What special stain would be used in assessing anemia?

What special stain would be used in assessing anemia?

• A. New methylene blue
• B. Lactophenol cotton blue
• C. Gram
• D. Acridine orange

Answer: (A)

Assessing anemia often hinges on evaluating how actively the bone marrow is producing red blood cells, which you gauge by counting reticulocytes. Reticulocytes are immature RBCs that still contain RNA. A supravital stain like New methylene blue is used because it specifically stains that residual RNA, making the delicate reticular network inside the cells visible under a standard microscope. This staining reveals reticulocytes clearly, enabling accurate reticulocyte counts and assessment of erythropoietic response. The other stains are used for different purposes: Gram stains bacteria, Acridine orange is a fluorescent stain for nucleic acids (often used in microbiology or cytology), and lactophenol cotton blue highlights fungi. None of these are suited for evaluating reticulocytes or anemia, so New methylene blue is the appropriate choice.

Assessing anemia often hinges on evaluating how actively the bone marrow is producing red blood cells, which you gauge by counting reticulocytes. Reticulocytes are immature RBCs that still contain RNA. A supravital stain like New methylene blue is used because it specifically stains that residual RNA, making the delicate reticular network inside the cells visible under a standard microscope. This staining reveals reticulocytes clearly, enabling accurate reticulocyte counts and assessment of erythropoietic response.

The other stains are used for different purposes: Gram stains bacteria, Acridine orange is a fluorescent stain for nucleic acids (often used in microbiology or cytology), and lactophenol cotton blue highlights fungi. None of these are suited for evaluating reticulocytes or anemia, so New methylene blue is the appropriate choice.