The following points highlight the two methods of staining of supplied smears. The methods are: 1. Albert’s Stain 2. Ziehl-Neelsen (ZN) or Acid-Fast Staining. Method # 1. Albert’s Stain: Usually examinee is provided with a fixed smear prepared from C. diphtheriae grown usually on Loeffler’s serum slope or occasionally from blood tellurite agar medium (Fig. […]