¨Stained preparations are needed in order to study their morphology and observe their cellular constituents
¨Smears can be made from liquid or solid cultures or from the clinical specimen
¨In Bacteriology, staining methods are divided into three categories
¨Simple stains: This makes use of the direct staining method.
Differential stains: This staining method divides bacteria into two groups
Special stains: These are specialized staining methods to demonstrate certain bacterial components, e.g. spore.