what's the difference between bacteria flagella, fimbria and pili?
FLAGELLA | FIMBRIA | PILI |
Long whip-like filamentous structures. | Bristle like short fibres. | Long hair like tubular microfibre like structures. |
Longer and thicker than fimbria and pili. | Shorter than pili and flagella. | Longer than fimbria and shorter than flagella. |
Approx 15-20 micrometre in length | Approx 0.03 to 0.14 micrometre in length. | Approx 0.5 to 2 micrometre in length. |
Present in both gram positive and gram negative bacteria. | Present in both gram positive and gram negative bacteria. | Present only in gram negative bacteria |
Flagella are distributed lateraly,polarily or throughout the surface | Evenly distributed on entire cell surface. | Randomly distributed on cell surface. |
Eg.E.coli,Helicobacter pylori | Eg.Salmonella typhyrium,Shigella dysenteria | Eg.Neisseria gonorrhoeae,Pseudomonas |
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