Resident members of natural bacterial communities limit the growth of non-resident bacteria primarily by increasing overall community growth.

Evolutionary game theory identifies reciprocation as a key winning strategy for warring bacteria.

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.

In a consumer-resource model obeying the physical requirement of flux conservation, metabolic competition between microbes yields consortia of cell types that collectively resist invasion via optimal use of resources.

Local abnormal fungi in Caesarean section scar diverticulum can affect the abundance of bacteria through specific metabolites, thereby destroying the stability of bacteria and the entire microbial community.

Both within and between hosts, the key factor guiding whether increasing treatment strength will increase or decrease antibiotic resistance is whether inter-strain competition is effective, not whether it is present.

High-throughput measurements of simplified bacterial communities find that when multiple species jointly inhibit a focal species of interest, their individual effects do not add up, but are dominated by the strongest single-species effect.

Receptor recognition of antimicrobial peptides is important for Salmonellae to survive inside macrophages and cause disease.

In the most comprehensive survey of sourdough starter biodiversity, this work identifies processes that control the diversity and function of sourdough microbiomes at a continental scale.

Parallel horizontal gene transfer has spread a bacteriolytic gene family to all domains of life, and has bestowed a niche-transcending adaptation in recipients that must deploy antibacterial molecules to survive in a bacterial world.