A Run-Twiddle Model for the Self Correlation Function of Bacteria in Chemotactic Bands

  • Paul C. Wang
  • Sow-Hsin Chen
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 73)


Microscopic motions of individual Escherichia coli in liquid chemotactic media have been extensively studied by stroboscopic photomicrographs1 and especially by tracking microscope2. The motions are shown to be characterized by sequential repetitions of either a “running” state in which a bacterium moves in a fairly straight path or a “twiddle” state in which the bacterium jigs around locally. Both the stroboscopic photomicrograph and tracking microscope techniques work well only when bacterial density in solution is relatively low. For studying bacterial motion in a chemotactic band, which has a very high bacterial density (108/ml), quasi-elastic light scattering technique is more suitable.3,4


Correlation Function Front Part Straight Path Parallel Case Bacterial Motion 
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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • Paul C. Wang
    • 1
  • Sow-Hsin Chen
    • 1
  1. 1.Nuclear Engineering DepartmentMassachusetts Institute of TechnologyCambridgeUSA

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