Dissolves non-fungal material, digest debris, to make fungal elements
more visible (acts as a clearing agent)
10-20% KOH Concentration
Skin, hair
10% KOH
Nails (hard tissues)
20% KOH
Most widely used staining method for fungi
Acts as both preservative and stain
Lactophenol Cotton Blue
Lactic Acid
Preservative
Phenol
Killing agent
Cotton Blue
Stain
Negative stain renders the organism colorless and colors the background
India Ink / Nigrosin
India Ink / Nigrosin demonstrates capsule of
Cryptococcus neoformans
Fluorochrome dye – best for direct microscopy
Calcofluor White Stain