A function of Pseudomonas aeruginosa PAO polar pili: twitching motility

Can J Microbiol. 1980 Feb;26(2):146-54. doi: 10.1139/m80-022.


Twitching motility is a mode of flagella-independent surface translocation exhibited by Pseudomonas aeruginosa and other bacteria on solid media. All species exhibiting it carry thin pili, usually polar. This work shows that only PAO and K strains of P. aeruginosa with retractile (PSA) pili were able to move in this way, those with no pili or non-retractile pili remaining stationary. Specific agents such as anti-pilus serum, which prevents otherwise functional pili from retracting, also prevented twitching motility.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Fimbriae, Bacterial / immunology
  • Fimbriae, Bacterial / physiology*
  • Movement
  • Pseudomonas aeruginosa / growth & development
  • Pseudomonas aeruginosa / immunology
  • Pseudomonas aeruginosa / physiology*