Acid Fast Staining
Acid-fast bacteria contain a lipid-rich cell wall with mycolic acid that is relatively impermeable to most basic dyes unless they are combined with phenol. Once stained, the cells resist decolorization with acidified organic solvents and are therefore called "acid-fast"
Growth on Lowenstein Jensen Media
Continue on to learn more about the Gram Stain
and its importance in classification of bacteria
MICRO & IMMUNO