Title: Bacteroidetes
Content:  The phylum "Bacteroidetes" is composed of three large classes of Gram-negative, nonsporeforming, anaerobic or aerobic, and rod-shaped bacteria that are widely distributed in the environment, including in soil, sediments, and sea water, as well as in the guts and on the skin of animals. Although some Bacteroides spp. can be opportunistic pathogens, many "Bacteroidetes" are symbiotic species highly adjusted to the gastrointestinal tract. Bacteroides are highly abundant in intestines, reaching up to 1011 cells g−1 of intestinal material. They perform metabolic conversions that are essential for the host, such as degradation of proteins or complex sugar polymers. "Bacteroidetes" colonize the gastrointestinal tract already in infants, as non-digestible oligosaccharides in mother milk support the growth of both Bacteroides and Bifidobacterium spp. Bacteroides spp. are selectively recognized by the immune system of the host through specific interactions.
Title: Bacteroidetes
Content:  human oral cavity. "Bacteroidetes" are not limited to gut microbiota, they colonize a variety of habitats on Earth. For example, "Bacteroidetes", together with "Proteobacteria", "Firmicutes", and "Actinobacteria", are also among the most abundant bacterial groups in rhizosphere. They have been detected in soil samples from various locations, including cultivated fields, greenhouse soils and unexploited areas. "Bacteroidetes" also inhabit freshwater lakes, rivers, as well as oceans. They are increasingly recognized as an important compartment of the bacterioplankton in marine environments, especially in pelagic oceans. Halophilic "Bacteroidetes" genus Salinibacter inhabit hypersaline environments such as salt-saturated brines in hypersaline lakes. Salinibacter  shares many properties with halophilic Archaea such as Halobacterium and Haloquadratum that inhabit the same environments. Phenotypically, Salinibacter is remarkably similar to Halobacterium and therefore for a long time remained unidentified.
Title: Bacteroides
Content:  Bacteroides is a genus of Gram-negative, obligate anaerobic bacteria. Bacteroides species are non endospore-forming bacilli, and may be either motile or nonmotile, depending on the species. The DNA base composition is 40–48% GC. Unusual in bacterial organisms, Bacteroides membranes contain sphingolipids. They also contain meso-diaminopimelic acid in their peptidoglycan layer. Bacteroides species are normally mutualistic, making up the most substantial portion of the mammalian gastrointestinal microbiota, where they play a fundamental role in processing of complex molecules to simpler ones in the host intestine. As many as 1010–1011 cells per gram of human feces have been reported. They can use simple sugars when available; however, the main sources of energy for Bacteroides species in the gut are complex host-derived and plant glycans. Studies indicate that long-term diet is strongly associated with the gut microbiome composition&mdash;those who eat plenty of protein and animal fats have predominantly Bacteroides bacteria, while for those who consume more carbohydrates the Prevotella species dominate. One of the most important clinically is Bacteroides fragilis. Bacteroides melaninogenicus has recently been reclassified and split into Prevotella melaninogenica and Prevotella intermedia.
Title: Bacteroidales
Content:  Bacteroidales is an order of bacteria. Notably it includes the genera Prevotella and Bacteroides, which are commonly found in the human gut microbiota.
Title: GrpE
Content:  Enterococci are bacteria that are commonly found in the gastrointestinal tract of animals, including humans. These bacteria can form a biofilm, which is a layer of bacteria attached to a surface. Enterococcal biofilm is prevalent in hospital and surgical settings, it is responsible for 25% of catheter-related infections, is found in 50% of root-filled teeth with apical periodontitis, and can be isolated from other wounds. GrpE is found in the genome of Enterococcus faecilis and Enterococcus faecium and is critical for enterococcal biofilm attachment to polystyrene tubes, a plastic polymer commonly used in hospital settings. Group A Streptococcus pyogenes is a bacterium that can lead to common infections, including strep throat and impetigo, but is also responsible for life-threatening infections. During infection, GrpE helps streptococcus bacteria adhere to pharyngeal epithelial cells. GrpE in Streptococcus binds to endogenous proline-rich proteins in saliva, allowing adhesion of the bacteria to the host.
Title: Bacteroides ureolyticus
Content:  Bacteroides ureolyticus is a species in the bacterial genus of Gram-negative, obligately anaerobic bacteria. Bacteroides species are non-endospore-forming bacilli, and may be either motile or non-motile, depending on the species. The DNA base composition is 40–48% GC. Unusual in bacterial organisms, Bacteroides membranes contain sphingolipids. They also contain meso-diaminopimelic acid in their peptidoglycan layer. Bacteroides are normally mutualistic, a substantial portion of the mammalian gastrointestinal flora, and they process complex molecules into simpler ones. As many as 1010-1011 cells per gram of human feces have been reported. They can use simple sugars when available; however, the main sources of energy for Bacteroides species in the gut are complex host-derived and plant glycans.
Title: Bacteroidetes
Content:  Bacteroides fragilis was the first Bacteroides species isolated in 1898 as a human pathogen linked to appendicitis among other clinical cases. By far, the ones in the Bacteroidia class are the most well-studied, including the genus Bacteroides (an abundant organism in the feces of warm-blooded animals including humans), and Porphyromonas, a group of organisms inhabiting the human oral cavity. The class Bacteroidia was formerly called Bacteroidetes; as it was until recently the only class in the phylum, the name was changed in the fourth volume of Bergey's Manual of Systematic Bacteriology. For a long time, it was thought that the majority of Gram-negative gastrointestinal tract bacteria belonged to the genus Bacteroides, but in recent years many Bacteroides spp. underwent reclassification. Based on current classification, the majority of the gastrointestinal "Bacteroidetes" spp. belongs to Bacteroidaceae, Prevotellaceae, Rikenellaceae, and Porphyromonadaceae families. This phylum is sometimes grouped with "Chlorobi", "Fibrobacteres", "Gemmatimonadates", "Caldithrix", and marine group A to form the FCB group or superphylum. In the alternative classification system proposed by Cavalier-Smith, this taxon is instead a class in the Sphingobacteria phylum.
Title: Bacteroides fragilis
Content:  The B. fragilis group is the most commonly isolated Bacteroidaceae in anaerobic infections, especially those that originate from the gastrointestinal microbiota. B. fragilis is the most prevalent organism in the B. fragilis group, accounting for 41% to 78% of the isolates of the group. These organisms are resistant to penicillin by virtue of production of beta-lactamase, and by other unknown factors. This group was formerly classified as subspecies of B. fragilis (i.e. B. f. ssp. fragilis, B. f. ssp. distasonis, B. f. ssp. ovatus, B. f. ssp. thetaiotaomicron, and B. f. ssp. vulgatus). They have been reclassified into distinct species on the basis of DNA homology studies. B. fragilis (formerly known as B. f. ssp. fragilis) is often recovered from 
Title: Bifidobacterium
Content:  Bifidobacterium is a genus of gram-positive, nonmotile, often branched anaerobic bacteria. They are ubiquitous inhabitants of the gastrointestinal tract, vagina and mouth (B. dentium) of mammals, including humans. Bifidobacteria are one of the major genera of bacteria that make up the gastrointestinal tract microbiota in mammals. Some bifidobacteria are used as probiotics. Before the 1960s, Bifidobacterium species were collectively referred to as "Lactobacillus bifidus".
Title: Bacteroidetes
Content:  In the gastrointestinal microbiota "Bacteroidetes" have a very broad metabolic potential and are regarded as one of the most stable part of gastrointestinal microflora. Reduced abundance of the "Bacteroidetes" in some cases is associated with obesity. This bacterial group appears to be enriched in patients suffering from irritable bowel syndrome and involved in type 1 and type 2 diabetes. Bacteroides spp. in contrast to Prevotella spp. were recently found to be enriched in the metagenomes of subjects with low gene richness that were associated with adiposity, insulin resistance and dyslipidaemia as well as an inflammatory phenotype. "Bacteroidetes" species that belong to classes Flavobacteriales and Sphingobacteriales are typical soil bacteria and are only occasionally detected in the gastrointestinal tract, except Capnocytophaga spp. and Sphingobacterium spp. that can be detected in 

Question: where would the group bacteroids likely be found?
Answer: the human colon.
human colon.