Study reveals oxygen flips mouth bacteria communication and enzymes strengthen healthy microbes

Cutting bacterial signals let health linked microbes surge—how

New research shows mouth bacteria change behavior depending on oxygen, with quorum sensing signals playing a key role in whether plaque becomes harmful. By using lactonase enzymes to block AHL chemical “communication,” scientists boosted health-linked oral microbes without killing them. The findings suggest future gum disease treatments could reshape plaque by rewiring bacterial messaging rather than using broad antibiotics.