Wright-Giemsa Stain Kit
Wright stain combines the acidic dye eosin (Eosin) with the basic dye methylene blue (Methylene Blue) to differentiate cellular structures. Giemsa stain consists of Azure II and eosin. Although the two stains have broadly similar staining mechanisms and color reactions, Giemsa stains the cytoplasm more strongly and shows its degree of basophilia more clearly. In blood and bone marrow specimens, it provides particularly effective staining of azurophilic, eosinophilic, and basophilic granules. However, its relatively intense nuclear staining can make fine intranuclear details difficult to distinguish. Because their staining properties are complementary, the two stains are often used together to offset their respective limitations.
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Storage :
RT, 2 years. Protect from light.
- Manual (2863KB)
- COA
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Description & Advantages
Wright stain combines the acidic dye eosin (Eosin) with the basic dye methylene blue (Methylene Blue) to differentiate cellular structures. Giemsa stain consists of Azure II and eosin. Although the two stains have broadly similar staining mechanisms and color reactions, Giemsa stains the cytoplasm more strongly and shows its degree of basophilia more clearly. In blood and bone marrow specimens, it provides particularly effective staining of azurophilic, eosinophilic, and basophilic granules. However, its relatively intense nuclear staining can make fine intranuclear details difficult to distinguish. Because their staining properties are complementary, the two stains are often used together to offset their respective limitations.
MCE Wright-Giemsa Staining Solution is prepared from imported dye materials and combines the strengths of both staining systems to produce clear, uniform staining. It is suitable for blood smears, bone marrow smears, and bacterial specimens. After staining, the cytoplasm appears reddish, nuclei and bacteria appear blue, and eosinophilic granules appear orange-red. The formulation contains neutral glycerol, which helps reduce methanol evaporation and oxidation while improving the clarity and durability of blood cell staining. The product consists of the Wright-Giemsa staining solution and a matching phosphate buffer. They may be mixed in equal volumes before use or applied separately to the specimen.
Protocols
Materials Required but Not Provided
Fixative: Methanol
Equipment and consumables: Microscope, staining rack, coverslips, and microscope slides
Horizontal Staining Method
1. Smear preparation: Prepare blood, bone marrow, cerebrospinal fluid, or bacterial smears using standard procedures. Allow the smears to air-dry, then place them horizontally on a staining rack.
2. Add the stain: Apply 0.5–1.0 mL of Wright-Giemsa Stain to completely cover the specimen area. Stain for 20–60 s. Note: Keep the smear covered with stain throughout this step to prevent it from drying.
3. Add the buffer and continue staining: Add the supplied phosphate buffer at approximately twice the volume of the stain. Gently agitate the liquid with a dropper, pipette, or pipette bulb to mix the stain and buffer thoroughly. Avoid touching the smear with the pipette tip.
| Specimen Type | Staining Time |
|---|---|
| Blood smear | 10–15 min |
| Bone marrow smear | 25–30 min |
| Cerebrospinal fluid smear | 10–15 min |
4. Rinse: After staining, tilt the slide slightly and gently rinse from one end with tap water or distilled water for approximately 30 s, until excess stain is removed. Note: Do not pour off the staining solution directly before rinsing, as dye precipitates may adhere to the specimen area. Avoid directing the water stream onto the smear.
5. Drying and microscopic examination: a. After rinsing, place the slide upright and allow it to air-dry. Do not wipe the specimen area. b. Examine the overall distribution and staining of the smear under low magnification, then use an oil-immersion objective to assess the morphology and staining characteristics of cells, bacteria, and other structures of interest.
| Cellular Component | Staining Result |
|---|---|
| Bacteria and cell nuclei | Blue |
| Cytoplasm of tissue cells, hemoglobin, and eosinophilic granules | Pink to orange-red |
Note: Staining results may vary with smear thickness, specimen type, buffer pH, staining time, and the extent of rinsing. When using the product for the first time, optimize the staining time within the recommended ranges above.
Storage
RT, 2 years.
Protect from light.
Attention
1. Blood or bone marrow smears should be of uniform thickness to ensure consistent staining.
2. Do not pour off the stain before rinsing. Rinse slowly from one end of the slide to prevent dye precipitates from adhering to the specimen.
3. If staining is too dark, gently destain with methanol or ethanol. Restaining is not recommended.
4. If staining is too dark or too light, adjust the staining time or stain concentration as appropriate.
5. This product is intended for scientific research by trained personnel only. It must not be used for clinical diagnosis or treatment, or in food or pharmaceutical products.
6. For your safety and health, wear a lab coat and disposable gloves when handling this product.
Components
| Components | HY-K0617 -100 mL | HY-K0617 -500 mL |
|---|---|---|
| Wright-Giemsa Stain | 100 mL | 500 mL |
| Phosphate Buffer | 100 mL | 500 mL |
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