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Selective forces imposed by the squid animal host drive rapid adaptation of non-native Vibrio fischeri bacteria through convergent mutations of large effect, unmasking preexisting coordinated regulation of symbiosis.

Genetic analysis and host colonization assays reveal a regulatory mechanism that enables a bacterial symbiont to bypass the constraints of quorum sensing to activate specific cellular traits necessary to colonize its host.

The growth environment driven ratio of ATP to growth rate, called absolute growth, determines the final population composition of Staphylococcus aureus and Pseudomonas aeruginosa when in co-culture.

Life-threatening S. aureus infections emerge from commensal nose bacteria in association with repeatable adaptive evolution.

Sequence signatures can be used to discriminate between selected and non-selected immune repertoires at different stages only at the collective population level but not at the level of single cells.

Pseudomonas aeruginosa coordinates invasion and destruction of Staphylococcus aureus communities by modulating single-cell and collective motility.

Legionella pneumophila can be inhibited by its own antimicrobial, HGA (homogentisic acid), but its density-dependent resistance to HGA restricts the potential for self-harm.

The global pathogen Vibrio cholerae monitors environmental polyamines to garner information about numbers of ‘self’ versus ‘other’ in the vicinity, and in response, to remain or disperse from biofilms.

High-throughput droplet-based cultivation of gut microbes reduces biases of traditional cultivation strategies and thereby enables detection of difficult-to-culture organisms, which is required in applications such as antibiotic screening.

A new model helps to predict under which conditions a species of bacteria will switch to a static lifestyle.