Leifson staining method of flagella
Requirements
- Bacterial culture (Pseudomonas fluorescens)
- Pipette
- Formaline
- Centrifuge
- Inoculation needle
- Bunsen burner
- Microscope
- Glass slide
- Coveralls
Prepare the following reagents:
Solution A:
- Sodium chloride 1.5 g
- Distilled water 100 ml
Solution B:
- Tannic acid 3.0 g
- Distilled water 100 ml
Solution C:
- Pararosaniline acetate 0.9 g
- Pararosaniline hydrochloride 0.3 g
- Ethanol (95%) 100 ml
Solution A and B are mixed in equal volumes and then added its 2 part in 1 part of Solution C.
Procedure
- Make a smear of bacterial culture on a clean glass slide.
- Draw a rectangle with the help of glass marking pencil, around the film.
- Flood dye Solution within the marked area of the wax line.
- Leave the slide for 7 – 15 min. Till golden line develops on the dry surface.
- Remove the stain by floating off the film with gentle flowing tap water.
- Examine under oil immersion.
Result
The bacterial body and flagella stain red.
Reference
Dr. R. C. Dubey – practical microbiology