WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions.
A genus of Gram-positive facultative anaerobes that occupy niches ranging from benign commensals (dental plaque, skin) to acute pathogens (pharyngitis, impetigo, invasive disease). Streptococci are uniquely manganese-dependent for catalytic scavenging of reactive oxygen…
Streptococcus agalactiae, also known as Group B Streptococcus (GBS), is a Gram-positive, facultatively anaerobic coccus that exists in two clinical contexts: (1) as a major neonatal pathogen causing life-threatening meningitis and sepsis in newborns, and (2) as an enric…
A Gram-positive, facultatively anaerobic bacterium formerly classified as Streptococcus bovis biotype I that holds a unique position in clinical medicine as a sentinel organism for colorectal cancer. The detection of S. gallolyticus in blood cultures (bacteremia or endo…
The primary architect of dental caries -- the most prevalent chronic infectious disease worldwide. S. mutans is a Gram-positive, facultative anaerobe that colonizes tooth surfaces and produces the acid-rich, metal-managed biofilms known as dental plaque. What sets this …
A Gram-positive pathogen (the "pneumococcus") that depends on iron, manganese, and zinc for virulence and has evolved dedicated transport systems for each. Iron is required for viability itself, manganese powers the superoxide dismutase needed to survive the oxidative b…
Streptococcus salivarius is a Gram-positive, facultatively anaerobic bacterium and one of the earliest colonizers of the human oral cavity. It dominates the tongue dorsum and saliva, representing up to 10% of the cultivable oral flora. S. salivarius occupies a paradoxic…
Streptococcus thermophilus is a Gram-positive, facultative anaerobic coccus that is the primary probiotic species used in commercial yogurt fermentation and thermophilic dairy fermentation worldwide. Distinct from pathogenic Streptococcus species, S. thermophilus produc…
A Gram-positive, obligate anaerobic genus that has emerged as one of the most consistently enriched taxa in colorectal cancer. The key pathogenic species P. anaerobius promotes colorectal carcinogenesis through multiple mechanisms including cholesterol biosynthesis indu…
A Gram-positive, obligate anaerobic bacterium within the Firmicutes phylum (family Peptostreptococcaceae) that has emerged as a consistently enriched organism in the colorectal cancer tumor microenvironment. While fusobacterium nucleatum receives the most attention as a…
Peptostreptococcus stomatis is a Gram-positive, obligately anaerobic coccus originally isolated from the human oral cavity (oral streptococcal species) that has emerged as a carcinogenic oral pathobiont enriched in colorectal cancer, particularly in advanced stages. Unl…
Barrett's esophagus (BE) is a premalignant condition in which the normal squamous epithelium of the distal esophagus is replaced by intestinal-type columnar epithelium (intestinal metaplasia). It is the primary risk factor for esophageal adenocarcinoma (EAC), a cancer w…
The most abundant mineral in the human body, with ~99% stored in bones and teeth. Calcium's biological significance extends far beyond structural support -- it is the universal second messenger in cell signaling, controlling neurotransmitter release, muscle contraction,…
A heterodimer of S100A8 and S100A9 calcium-binding proteins that constitutes approximately 60% of the cytosolic protein content of neutrophils. Calprotectin is a central effector of nutritional immunity, sequestering essential transition metals from invading pathogens a…
Catalase is a heme-iron enzyme that decomposes hydrogen peroxide into water and oxygen. In microbial peroxide defense, it acts downstream of superoxide dismutase: superoxide dismutase converts superoxide to hydrogen peroxide, and catalase removes that hydrogen peroxide …
Dental caries (tooth decay) is the most prevalent chronic disease worldwide, driven by acid-producing biofilm bacteria — primarily Streptococcus mutans and Lactobacillus species — that demineralize tooth enamel. In the WikiBiome framework, dental caries connects to the …
Finegoldia is a genus of Gram-positive, strictly anaerobic cocci, with Finegoldia magna as the primary species of clinical relevance. Formerly classified within Peptostreptococcus, this organism inhabits mucosal surfaces including the vaginal, skin, and gastrointestinal…
Gastroesophageal reflux disease (GERD) is a chronic condition in which stomach acid or bile flows back into the esophagus, causing mucosal damage and symptoms such as heartburn and regurgitation. Affecting approximately 20% of Western populations, GERD is conventionally…
Pneumonia is infection of the lung parenchyma, most commonly caused by streptococcus pneumoniae, Klebsiella pneumoniae, Haemophilus influenzae, and viruses (influenza, SARS-CoV-2). In the WikiBiome framework, pneumonia exemplifies the metal battleground at the host-path…
The semen microbiome refers to the microbial community inhabiting the male reproductive tract and seminal fluid. Core genera identified through shotgun metagenomic sequencing include Corynebacterium, Staphylococcus, Streptococcus, and Prevotella, though composition vari…
A Gram-negative, obligate anaerobic genus within the Firmicutes phylum (class Negativicutes, family Veillonellaceae). The primary species V. parvula is a specialized lactate utilizer that occupies a unique metabolic niche by cross-feeding with lactate-producing bacteria…
A family of Gram-negative, obligate anaerobic bacteria within the Firmicutes phylum (class Negativicutes) that occupies a unique metabolic niche as specialized lactate utilizers. Veillonellaceae cannot ferment sugars directly -- instead, they cross-feed on lactate produ…