Gram Staining

Gram staining is a laboratory technique used to classify bacteria into two categories: Gram-positive and Gram-negative. This process involves applying a series of dyes to bacterial samples on a slide. If the bacteria retain a purple dye after washing, they are considered Gram-positive, which usually indicates a thicker cell wall. If they turn pink, they are Gram-negative, typically reflecting a thinner cell wall. This distinction helps in identifying bacterial species and guiding treatment options, as different bacteria respond differently to antibiotics based on their cell wall characteristics.