Bacterial Motility and Biofilm Formation Dynamics

The dynamics of bacterial motility and biofilm formation underpin many critical processes in environmental, industrial and clinical contexts. Motility enables single cells and populations to explore and exploit their surroundings through distinct mechanisms such as swimming, swarming and twitching. These modes of movement are driven by flagellar rotation, type IV pili activity and surface-associated fluid mechanics, which together facilitate dispersion, nutrient acquisition and host colonisation. By contrast, biofilms represent surface-attached communities encased in a self-produced extracellular polymeric substance, affording protection against environmental stressors and antibiotics. The transition between motile and sessile lifestyles is finely regulated by factors including nutrient availability, cell–cell signalling and matrix production. Recent studies have begun to decipher how physical parameters such as fluid flow, surface topology and intercellular forces interact with molecular networks to govern collective migration, matrix assembly and dispersal. Understanding these processes has profound implications for managing chronic infections, wastewater treatment and biofouling control, as well as harnessing beneficial biofilms for bioremediation and industrial bioprocessing.

Research from Nature Portfolio

Investigations into adaptive resistance during collective movement have revealed that cell death within swarming populations can release necrosignals that enhance survival of the remaining cells. Decayed bacteria liberate efflux-pump components that interact with live cells to upregulate antibiotic export systems, promoting transient multidrug resistance across diverse species. This finding has reshaped our understanding of how biofilm communities may serve as reservoirs for genetic resistance and highlights the need to consider intercellular signalling in strategies to disrupt persistent infections.

Bacterial Motility and Biofilm Formation Dynamics publication trend

The graph below shows the total number of articles in bacterial motility and biofilm formation dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Biofilm: A structured community of microbial cells attached to a surface and embedded in a self-produced extracellular polymeric matrix.

Swarming motility: Collective, rapid movement of bacterial populations across semi-solid surfaces, driven by coordinated flagellar activity and surfactant secretion.

Extracellular polymeric substance (EPS): Hydrated matrix of polysaccharides, proteins and nucleic acids produced by biofilm cells, providing structural stability and protection.

Quorum sensing: Cell–cell communication mechanism that enables bacteria to regulate gene expression in response to changes in population density.

Surfactant: Surface-active compound secreted by bacteria to reduce surface tension and facilitate spread on solid or semi-solid substrates.

References

1. Understanding how bacterial collectives organize on surfaces by tracking surfactant flow. Current Opinion in Solid State and Materials Science (2023).
2. Pseudovibriamides from Pseudovibrio marine sponge bacteria promote flagellar motility via transcriptional modulation. mBio (2024).
3. Bacterial Motility and Its Role in Skin and Wound Infections. International Journal of Molecular Sciences (2023).
4. Dead cells release a ‘necrosignal’ that activates antibiotic survival pathways in bacterial swarms. Nature Communications (2020).