title: Measurement of Proteus cell motility during swarming.
abstract: The motilities of Proteus long forms during swarming on agar were measured on cells transferred to liquid suspension. During concentric-ring formation on solid medium, when the edge of the swarm was advancing slowly or had stopped, the velocity of long-form motility was low. When the colony was spreading rapidly, long-form velocitywas relatively high. This periodic variation in cell velocity, which determines the zones formed during swarming, cannot adequately be explained by negative chemotaxis.
mesh_terms: D001431:Bacteriological Techniques; D002633:Chemotaxis; D009068:Movement; D011513:Proteus mirabilis / Q000166:cytology / Q000502:physiology*; D011514:Proteus vulgaris / Q000166:cytology / Q000502:physiology*