There are numerous ways by which cyclic dimeric GMP (c-di-GMP) inhibits motility. Kuchma et al. (S. L. Kuchma, N. J. Delalez, L. M. Filkins, E. A. Snavely, J. P. Armitage, and G. A. O'Toole, J. Bacteriol. 197:420-430, 2015, http://dx.doi.org/10.1128/JB.02130-14) offer a new, previously unseen way of swarming motility inhibition in Pseudomonas aeruginosa PA14. This bacterium possesses a single f...

Surface mo lity such as swarming is thought to precede biofilm forma on during spread of infec on. Popula on of swarming bacteria P. aeruginosa, major infec on in hospitals, will be shown to efficiently propagate as high density waves that move symmetrically as rings within swarms towards the extending tendrils. Mul -scale model simula ons suggested a cell-cell coordina on mechanism of wave pro...

There are many well-studied swarming algorithms (for example, [2], [4], [5], [6], [7], [8], and [9]) which are often suited to very specific purposes. As mobile sensor networks become increasingly complex, and are comprised of more and more agents, it makes sense to consider swarming algorithms for movement control. We introduce a natural way to measure the reliability of various swarming algor...

Biological systems are capable of acting in a shared environment to produce emergent, self-organized behavior that is the result of the constraints imposed by local interactions– such as bird flocking or ant swarming behavior. These examples present minimal demands for a shared-intention between co-actors, whereas other instances necessitate the formation of a shared goal. In these goal-directe...

Honey bee colonies exhibit a wide range of behavioral variations depending on genetic origin and environmental factors. Therefore, the performance evaluation honey races is critical to laying foundation for future selection improvement in Ethiopia. Thirty Apis mellifera scutellata (A. m. scutellata) similar resources contained hive were kept improved box hives evaluated through various behavior...

We report the first controlled measurements of expansion rates for swarming colonies of Serratia liquefaciens under different growth conditions, combined with qualitative observations of the organization of the colony into regions of differentiated cell types. Significantly, the results reveal that swarming colonies of S. liquefaciens can have an increasing expansion rate with time. We compare ...

Anethum graveolens L. has been known as an aromatic, medicinal, and culinary herb since ancient times. The main purpose of this study was to determine the chemical composition, antibacterial, antibiofilm, anti-quorum sensing activities essential oil (EO) obtained by hydro-distillation aerial parts. Twelve components were identified, representing 92.55% analyzed oil. Limonene (48.05%), carvone (...

The ability of nitric oxide (NO) to induce biofilm dispersion has been well established. Here, we investigated the effect of nitroxides (sterically hindered nitric oxide analogues) on biofilm formation and swarming motility in Pseudomonas aeruginosa. A transposon mutant unable to produce nitric oxide endogenously (nirS) was deficient in swarming motility relative to the wild type and the comple...