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Related Concept Videos

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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Functions of the Gut Microbiota01:18

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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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Bacterial Flora of the Large Intestine01:29

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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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Development of Human Microbiota01:30

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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...
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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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Probiotics01:22

Probiotics

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Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
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An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
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Intestinal flora and human health.

T Mitsuoka1

  • 1The University of Tokyo, Japan.

Asia Pacific Journal of Clinical Nutrition
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Summary
This summary is machine-generated.

The intestinal flora, composed of beneficial and harmful bacteria, impacts human health. Oral bacterio-therapy with beneficial bacteria can restore balance, improving nutrition and preventing disease.

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Area of Science:

  • Microbiology
  • Human Health
  • Gastroenterology

Background:

  • The human intestines host trillions of bacteria, collectively known as intestinal flora, crucial for health.
  • Intestinal flora comprises beneficial and harmful bacteria; a healthy state is characterized by a dominance of beneficial microbes.
  • An imbalance favoring harmful bacteria is linked to various diseases, including cancer, liver/kidney disease, and reduced immunity.

Purpose of the Study:

  • To explore the role of intestinal flora in human health and disease.
  • To investigate factors disrupting the intestinal flora balance.
  • To evaluate the potential of oral bacterio-therapy in restoring intestinal balance and promoting health.

Main Methods:

  • Literature review on intestinal flora composition and function.
  • Analysis of factors influencing the balance between beneficial and harmful gut bacteria.
  • Examination of the effects of oral bacterio-therapy using lactic acid bacteria (e.g., Lactobacillus, Bifidobacteria).

Main Results:

  • Beneficial bacteria produce essential nutrients and suppress pathogens.
  • Harmful bacteria contribute to putrefaction, toxin production, and are implicated in chronic diseases and aging.
  • Oral bacterio-therapy with specific strains can restore microbial balance and confer health benefits.

Conclusions:

  • Maintaining a balanced intestinal flora is vital for overall health.
  • Disruptions in gut microbiota are associated with numerous health issues.
  • Oral bacterio-therapy represents a promising strategy for managing gut health and preventing disease.