Related Experiment Video
Updated: May 5, 2026

11:22
Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
Published on: October 15, 2019
29.4K
Microbiota in the stomach: new insights
Wen Ming Wu1, Yun Sheng Yang, Li Hua Peng
1Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, Beijing, China.
Journal of Digestive Diseases
|November 20, 2013
Summary
The stomach
Area of Science:
- Microbiology
- Gastroenterology
Background:
- The stomach's low pH and defenses limit bacterial presence.
- Factors like diet, H. pylori, and medications impact stomach microbiota.
- Host-microbe interactions in the stomach are increasingly studied.
Purpose of the Study:
- To review current literature on gastric microbiota.
- To understand the role of stomach bacteria in health and disease.
- To identify future research directions.
Main Methods:
- Literature review of scientific publications.
- Analysis of culture-independent studies.
- Synthesis of data on host-microbe interactions.
Main Results:
- Gastric microbiota is influenced by innate defenses and external factors.
- New technologies enable detailed study of stomach microflora.
- Understanding gastric flora is crucial for gastrointestinal health.
Conclusions:
- The stomach environment shapes its unique microbiota.
- Further research is needed to elucidate the full impact of gastric bacteria.
- This review provides a foundation for future investigations.
Related Concept Videos
Microbiota of the Stomach and Small Intestine
92
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,...
92
Introduction to the Human Microbiota
222
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,...
222
What is Monogastric Digestion?
56.6K
The human body contains a monogastric digestive system. In a monogastric digestive system, the stomach only contains one chamber in which it digests food. Several other animal species also have monogastric digestive systems, including pigs, horses, dogs, and birds. This chapter, however, focuses on the human digestive system.
56.6K
Microbiota of the Large Intestine
108
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...
108
Functions of the Gut Microbiota
254
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...
254
Gastritis II: Pathophysiology
87
The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...
87

