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El fenómeno más conocido de éstos es el de “swarming”, observado en Proteus spp., en el cual las bacterias sufren una transfiguración importante convirtiéndose en formas filamentosas hiperflageladas. Sin embargo, otros tipos de desplazamiento que se presentan son “swim-ming”, “twiching”, “gliding”, “sliding” y ...
El género en que mejor se ha estudiado este fenómeno es Proteus, cuyo fenómeno de "swarming" se caracteriza por la formación de círculos concéntricos a partir del punto de inoculación, que le brindan un aspecto de diana a la colonia. Este patrón puede observarse fácilmente cuando se inocula la bacteria en el centro de un plato de cultivo ( 1 - 4 ).
Swarming motility is operationally defined as multicellular, flagella-mediated, surface migration. Swarming also requires an increase in flagellar number, intercellular interactions, and surfactant secretion. Swarming motility has often been genetically bred-out of laboratory strains and is best observed in natural isolates.
One particular feature of this type of motility is the formation of dendritic fractal-like patterns formed by migrating swarms moving away from an initial location. Although the majority of species can produce tendrils when swarming, some species like Proteus mirabilis do form concentric circles motif instead of dendritic patterns.
28 de may. de 2020 · Swarming bacteria are recognizable by the pattern they produce during swarming as shown for a few in Fig. 2. Proteus mirabilis has unique swarming behavior. Unlike other species that have a single initiation into the swarming phase, P. mirabilis proceeds through iterative swarming and consolidation ( dedifferentiation ) steps to ...
19 de nov. de 2012 · Future work will focus on determining the mechanisms of action of each swarming cue to understand how Proteus mirabilis utilizes these factors to sense and respond to the environment, thus gaining new insight into the regulation of swarming and potentially identifying new targets to prevent swarming on catheters.
This swarming is described as the formation of concentric zones of bacterial growth, able to cover the whole surface of solid culture medium . It frequently interferes with the enumeration of other microorganisms in clinical microbiology investigations and enhances the difficulty of isolating organisms from mixed bacterial species.
