Acid fast

• What does the acid fast technique show?

  It differentiates different species of mycobacteria from eachother
• What dye is used

  carbolfuchsin dye
• What carries the dye to the cell

  A lipid solvent
• What are the cells then washed with

  a dilute acid-alchol solution
• What happens to the stain after the cell being washed

  The mycobacteria retain the stain but other bacteria do not
• What colour is the stain

  Bright red
• What stain is used on the other bacteria

  Methylene blue