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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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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...
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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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The Oral Microbiota01:27

The Oral Microbiota

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The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
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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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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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Updated: Apr 28, 2026

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Exploring new horizons in microbiome research.

Christoph A Thaiss1, Eran Elinav1

  • 1Immunology Department, Weizmann Institute of Science, Rehovot, Israel.

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This summary is machine-generated.

Leading scientists convened to discuss microbiome research, covering current challenges, technological progress, and future directions in the field. This summary highlights key concepts from their meeting.

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Area of Science:

  • Microbiome research and microbial ecology.

Background:

  • A 2014 meeting of leading scientists at Lake Titisee, Germany, addressed the current status of microbiome research.
  • Key discussion points included unresolved questions and emerging technological advancements.

Framework:

  • The meeting focused on identifying critical challenges and future research avenues in the microbiome field.
  • Discussions aimed to establish a consensus on the state-of-the-art and future directions.

Implementation:

  • Scientists shared insights on cutting-edge technologies and methodologies applicable to microbiome studies.
  • The exchange facilitated a review of current tools and their limitations.

Implications:

  • The discussions highlighted the need for continued innovation in microbiome research technologies.
  • Outcomes provide a roadmap for future scientific inquiry and collaboration in the field.