Slime layer

Definition

A slime layer is a loosely organized, sticky layer outside the cell wall of some bacteria that provides protection and aids in adherence to surfaces. It is composed primarily of polysaccharides.

5 Must Know Facts For Your Next Test

1. The slime layer helps bacteria evade immune responses by hiding surface antigens.
2. It can aid in biofilm formation, which enhances bacterial survival in hostile environments.
3. Slime layers are less structured compared to capsules, making them more easily washed off.
4. They play a crucial role in the colonization of surfaces, including medical devices and tissues.
5. The composition of the slime layer can vary significantly between different bacterial species.

Review Questions

Related terms

Capsule:

A well-organized, tightly bound external layer that also offers protection and aids in adherence but is more structured than a slime layer.

Biofilm:

A community of microorganisms living within a shared mass of secreted slime adhering to surfaces.

Glycocalyx: A general term for any viscous substance surrounding cells, including both capsules and slime layers.