Which situation is associated with a smear pale RBCs and dark basophilic components due to staining issues?

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Multiple Choice

Which situation is associated with a smear pale RBCs and dark basophilic components due to staining issues?

A high-pH stain (too basic) disrupts the balance between the acidic eosin and the basic dyes used in this stain. In Wright-Giemsa, eosin gives the red-pink color to the RBC cytoplasm, while the basic dye components color nuclei and basophilic granules dark purple. When the stain is too basic, eosin binding is reduced, so the RBC cytoplasm appears pale. Meanwhile the basic dyes continue to bind strongly to acidic structures like nucleic acids, making basophilic components appear very dark. So a smear with pale red blood cells and dark basophilic elements points to a stain with pH higher than the optimal range, around 6.4–6.8.

A high-pH stain (too basic) disrupts the balance between the acidic eosin and the basic dyes used in this stain. In Wright-Giemsa, eosin gives the red-pink color to the RBC cytoplasm, while the basic dye components color nuclei and basophilic granules dark purple. When the stain is too basic, eosin binding is reduced, so the RBC cytoplasm appears pale. Meanwhile the basic dyes continue to bind strongly to acidic structures like nucleic acids, making basophilic components appear very dark. So a smear with pale red blood cells and dark basophilic elements points to a stain with pH higher than the optimal range, around 6.4–6.8.

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