The staining of acid fast bacilli in sections of glycol methacrylate embedded tissues.

Acid-fast bacilli can be stained in tissue embedded in glycol methacrylate. Modification of the Ziehl-Neelsen technique, along with changes in the formula of the plastic embedding medium, allow production of 1 to 2 micron sections which retain their integrity throughout the procedure, and within which the bacilli are clearly visible.