Slime layer

A Slime layer in bacteria is an easily removed, diffuse, unorganised layer of extracellular material that surrounds a bacteria cell. Specifically this consists mostly of exopolysaccharides, glycoproteins, and glycolipids.

The function of the slime layer is to protect the bacteria cell from environmental dangers such as antibiotics and desiccation. The slime layer also allows bacteria to adhere to smooth surfaces such as prosthetic medical devices and catheters.

A bacterial capsule is similar, but is a well ordered structure that is resistant to washing off.