Biofilms are masses of microorganisms that bind to and multiply on a solid surface, typically
with a fluid bathing the microbes. The microorganisms that are not attached but are free …

Streptococci readily colonize mucosal tissues in the nasopharynx; the respiratory,
gastrointestinal, and genitourinary tracts; and the skin. Each ecological niche presents a …

Recent analyses with ribosomal RNA-based technologies have revealed the diversity of
bacterial populations within dental biofilms, and have highlighted their important …

The vast majority of bacteria require iron for growth. 1, 2 Iron is an essential element
required for key biological processes, including amino acid synthesis, oxygen transport …

The Porphyromonas gingivalis type IX secretion system (T9SS) promotes periodontal
disease by secreting gingipains and other virulence factors. By in situ cryoelectron …

In the present study we show that lux S of Bifidobacterium breve UCC2003 is involved in the
production of the interspecies signaling molecule autoinducer-2 (AI-2), and that this gene is …

Background Great excitement accompanied discoveries over the last decade in several
Gram-negative and Gram-positive bacteria of the LuxS protein, which catalyzes production …

Porphyromonas gingivalis is a Gram-negative anaerobic bacterium that colonizes the
human oral cavity. It is implicated in the development of periodontitis, a chronic periodontal …

During infection, Streptococcus pneumoniae exists mainly in sessile biofilms rather than in
planktonic form, except during sepsis. The capacity to form biofilms is believed to be …

Porphyromonas gingivalis is a keystone pathogen in periodontitis, a biofilm-mediated
infection disease. This research aimed to investigate the effect of coumarin on P. gingivalis …