Incubation and its effect on Leishman stain

Area of Science:

• Hematology
• Laboratory Medicine
• Histopathology

Background:

• Leishman stain is a globally recognized standard for peripheral blood smear analysis.
• Staining quality can be compromised by environmental factors like high humidity, particularly during the rainy season.

Purpose of the Study:

• To evaluate the impact of pre-incubation steps on standard Leishman staining.
• Investigate the effects of incubating the glass slide, buffer solution, or both on staining outcomes.

Main Methods:

• Twenty peripheral blood smears were analyzed using a modified Leishman staining protocol.
• Modifications included pre-incubation of slides, buffer solutions, or both.
• Staining characteristics were quantitatively assessed using a scoring system, followed by statistical analysis.

Main Results:

• The technique involving pre-incubation of both slides and buffer solution yielded the highest mean scores.
• Significant improvements were observed in background clarity, nuclear and cytoplasmic feature visualization, and granule staining.
• Statistical analysis confirmed the significance of these observed improvements.

Conclusions:

• Pre-incubating glass slides and/or buffer solutions enhances the quality of Leishman-stained peripheral blood smears.
• The modified technique offers superior staining characteristics compared to the routine method, improving diagnostic accuracy.