Common symptoms include: 1  Pain or tenderness in your face, jaw joint area, neck and shoulders, and in or around the ear when you chew, speak, or open your mouth wide. 2  Problems when you try to open your mouth wide. 3  Jaws that get stuck or lock in the open-or closed-mouth position.
Fimbriae: 1  Structure: Similar to pili, but shorter and more abundant on the cell surface. 2  Function: Adhesion of cells to surface and formation of pellicles (biofilms) containing thin sheets of cells on a liquid surface.
Pili vs Fimbriae. Pili and fimbriae are known as filamentous appendages, which are used mainly for adhesion. These structures are extremely fine appendages arising from the surface of bacteria and are firstly described by hoodwink and van Iterson. These are thinner than flagella and are not used in motility. The terms Pili and fimbriae are used interchangeably, but they can be distinguished. The term pili is used mainly for longer and sparser appendages, whereas fimbriae are used for shorter and numerous appendages. Pili. Pili are hair-like microfibers with approximately 0.5 to 2 Âµm in length and 5 to 7 nm in diameter.