Final answer:
Eosinophil granules stain reddish-orange with Wright and Wright-Giemsa stains, whereas quick stains may not be consistent, which can lead to misdiagnosis.
Step-by-step explanation:
Eosinophils are a type of granular leukocyte that contains granules staining reddish-orange with Wright and Wright-Giemsa stains. These granules are larger than those in neutrophils and basophils, which helps distinguish eosinophils. Basophils, on the other hand, contain granules that stain dark blue to purple.
In contrast, gram-positive bacteria retain a purple color in the Gram staining method due to their thick peptidoglycan cell wall structure. Although eosinophil granules typically stain well with Wright and Wright-Giemsa stains, some quick stain methods may not consistently stain these granules, potentially leading to a misdiagnosis when those methods are used.