Which of the following is the negative stain: (A) Fontana, (B) ZN stain, (C) Nigrosin, (D) Alber stain
Answer is C. Ref Robbins 9/e p 69 Negative staining is a techinque in which the background is stained.leaving the actual specimen untouched and thus visible, in contrast with positive staining ,the actual specimen is stained