What is Lactophenol cotton blue used for?
What is Lactophenol cotton blue used for?
Lactophenol cotton blue is a stain that is used to examine fungal elements following either a tape preparation or a scraping. This stain contains phenol, which will kill the organisms, lactic acid which preserves fungal structures, and cotton blue which stains the chitin found in the fungal cell walls.
Why is fungi stained with Lactophenol cotton blue?
Phenol kills fungus. Lactic acid acts as a clearing agent and helps preserve the fungal structures. Cotton blue is an aniline dye that stains the chitin in the fungal cell walls which adds colour to the fungal preparation thereby enhancing and contrasting the structures.
Can Lactophenol cotton blue stain bacteria?
Dark blue rings and circles emerged when the non-specific polysaccharide stain lactophenol cotton blue was added to Gram stained slides. The dark blue staining is attributable to the presence of capsular polysaccharides and bacterial slime associated with clumps of Gram-negative bacteria.
What is the principle of Lactophenol cotton blue stain?
Lactophenol Cotton Blue (LPCB) Staining method works on the principle of aiding the identification of the fungal cell walls. Fungi are eukaryotic organisms with both macroscopic and microscopic characteristics.
How does Lactophenol aniline blue work?
Remel Lactophenol Aniline Blue is a stain recommended for use in wet mount preparations for microscopic examination of fungi. Phenol precipitates cytoplasmic proteins and inactivates enzyme systems within the fungal cell. Glycerol prevents drying, allowing for examination of the stain 18-24 hours after preparation.
What are the composition of Lactophenol?
Lactophenol cotton blue (LCB) is a mixture of methyl blue, a histological stain, and lactophenol (a solution of phenol, lactic acid, and glycerol in water). It is used in wet-mount preparations for visualization of fungal structures, especially in medical mycology.
What are the four major components of Lactophenol cotton blue?
Lactophenol Cotton Blue (LPCB).
- Cotton blue (Aniline blue) 0.05 g.
- Phenol crystals (C6H5O4) 20 g.
- Glycerol 40 mL.
- Lactic acid (CH3CHOH COOH) 20 mL.
- Distilled water 20 mL.
What is the composition of Lactophenol cotton blue?
How can you differentiate yeast from bacteria from wet mounts?
The best method is if you have a phase contrast microscope you can see the difference very well. You can do centrifugation of fermenter sample around 1000 g for 5 to 10 min , which will first remove the fungal growth and followed by supernatant smear gram staining to check bacterial contamination.
What are the components of lactophenol?
The preparation has three components: phenol, which will kill any live organisms; lactic acid which preserves fungal structures, and cotton blue which stains the chitin in the fungal cell walls.
