The passive diffusion of Leptospira interrogans

Lyndon Koens, Eric Lauga

Research output: Contribution to journalArticle

10 Citations (Scopus)


Motivated by recent experimental measurements, the passive diffusion of the bacterium Leptospira interrogans is investigated theoretically. By approximating the cell shape as a straight helix and using the slender-body-theory approximation of Stokesian hydrodynamics, the resistance matrix of Leptospira is first determined numerically. The passive diffusion of the helical cell is then obtained computationally using a Langevin formulation which is sampled in time in a manner consistent with the experimental procedure. Our results are in excellent quantitative agreement with the experimental results with no adjustable parameters.

Original languageEnglish
Article number066008
Pages (from-to)1-12
Number of pages12
JournalPhysical Biology
Issue number6
Publication statusPublished - Dec 2014
Externally publishedYes


  • Bacterial diffusion
  • Brownian motion
  • Helix
  • Leptospira
  • Slender bodies
  • Stokes flow

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