Lab method
Lactophenol cotton blue
Mounting stain for mold morphology
LAK-toe-FEE-nol
High-yield clue
Lactophenol cotton blue is the go-to mount for studying mold structures like conidiophores and macroconidia.
Overview
A mounting-fluid stain concept for examining fungal (especially mold) morphology, where cotton blue dye colors chitin in cell walls while phenol and lactic acid preserve structures.
Classification
- Mounting-medium stain concept
- Mold morphology method
- Chitin-binding dye
- Light microscopy
Lab & identification clues
- Cotton blue colors fungal cell walls
- Preserves hyphae and fruiting-body shape
- Used with tease/tape mount vocabulary
- Reveals conidia and spore arrangement
Associations
- Aspergillus conidiophore recognition
- Dermatophyte macro/microconidia study association
- Mold identification vocabulary
Commonly confused with
- KOH preparation
- Calcofluor white stain
Frequently asked questions
What is Lactophenol cotton blue?
A mounting-fluid stain concept for examining fungal (especially mold) morphology, where cotton blue dye colors chitin in cell walls while phenol and lactic acid preserve structures.
What is the high-yield clue for Lactophenol cotton blue?
Lactophenol cotton blue is the go-to mount for studying mold structures like conidiophores and macroconidia.
What is Lactophenol cotton blue associated with?
Lactophenol cotton blue is associated with Aspergillus conidiophore recognition, Dermatophyte macro/microconidia study association, and Mold identification vocabulary.
What is Lactophenol cotton blue commonly confused with?
Lactophenol cotton blue is commonly confused with KOH preparation and Calcofluor white stain.
Original concept summary for coursework. Sources checked: OpenStax Microbiology 2e and NCBI Bookshelf Medical Microbiology; reviewed 2026-06. Describes vocabulary and interpretation concepts only; not a lab protocol and not for handling specimens or identifying patient isolates.