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Related Concept Videos

Functions of the Gut Microbiota01:18

Functions of the Gut Microbiota

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The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...
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Microbiota of the Stomach and Small Intestine01:27

Microbiota of the Stomach and Small Intestine

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The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
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Microbiota of the Large Intestine01:27

Microbiota of the Large Intestine

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The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
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Development of Human Microbiota01:30

Development of Human Microbiota

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The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from...
61
Introduction to the Human Microbiota01:22

Introduction to the Human Microbiota

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Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity,...
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Bacterial Flora of the Large Intestine01:29

Bacterial Flora of the Large Intestine

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The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
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[Fecal microbiota transplantation in recurrent Clostridium difficile infections. Framework and pharmaceutical preparation aspects].

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Faecal microbiota transplantation: Key points to consider.

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[Fecal microbiota transplantation: review].

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Faecal microbiota transplantation: a sui generis biological drug, not a tissue.

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Related Experiment Video

Updated: May 3, 2026

Applying Advanced In Vitro Culturing Technology to Study the Human Gut Microbiota
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[Current view on gut microbiota].

P Bourlioux1

  • 111, avenue de la République, 94400 Vitry-sur-Seine, France.

Annales Pharmaceutiques Francaises
|January 21, 2014
PubMed
Summary

The gut microbiota is crucial for human health, influencing digestion and immunity. Maintaining a healthy gut microbiome is essential, but further research is needed for safe fecal microbial transplantation and understanding pollutant effects.

Keywords:
CompositionEnvironmentEnvironnementFonctionsFunctionsGut microbiotaHealthMedicinesMicrobiote intestinalMédicamentsProtectionSantéXenobioticsXénobiotiques

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Area of Science:

  • Microbiome research
  • Human health
  • Symbiotic relationships

Context:

  • Metagenomic research has revealed the significant role of gut microbiota in human health.
  • The gut microbiota exists in symbiosis with the host organism.
  • It favorably interacts with numerous physiological functions.

Purpose:

  • To highlight the dual role of gut microbiota in maintaining health and contributing to pathologies like inflammatory bowel disease, obesity, and metabolic syndrome.
  • To emphasize the importance of protecting and maintaining gut microbiota health from a young age.
  • To underscore the need for caution and further research regarding fecal microbial transplantation (FMT) and the impact of environmental factors on the gut microbiome.

Summary:

  • Gut microbiota plays a vital role in human health, engaging in symbiosis and supporting physiological functions.
  • Dysbiosis, an imbalance in gut microbiota, is linked to various diseases including inflammatory bowel diseases, obesity, and metabolic syndrome.
  • Protecting gut microbiota health early in life is crucial. Fecal microbial transplantation (FMT) shows promise but requires careful study, as do the effects of pollutants on microbial functions.

Impact:

  • Advances in understanding gut microbiota are transforming approaches to human health and disease management.
  • Further research into FMT is necessary to establish safety and standardized protocols.
  • Investigating the impact of xenobiotics, pesticides, and pollutants on gut microbiota function is critical for public health and therapeutic development.