Related Experiment Video
Updated: Apr 14, 2026
05:23
Gastric Mucosa Quantitative Polymerase Chain Reaction Analysis for Detecting Helicobacter pylori and Antibiotic Resistance
Published on: March 7, 2025
903
The human gut resistome.
1Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands w.vanschaik@umcutrecht.nl.
Summary
The human gut microbiota harbors antibiotic resistance genes, with transfer events mostly occurring between commensal bacteria. This transfer can contribute to the rise of multi-drug resistant pathogens.
Area of Science:
- Microbiology
- Genetics
- Public Health
Background:
- Antibiotic resistance in bacterial pathogens poses a significant global health threat.
- The human gut microbiota is a complex ecosystem facilitating genetic material exchange, including antibiotic resistance genes.
- Technological advancements enable comprehensive studies of the gut resistome.
Purpose of the Study:
- To investigate the diversity and dynamics of antibiotic resistance genes within the human gut microbiota.
- To understand the mechanisms and frequency of horizontal gene transfer of resistance genes in the gut.
- To assess the contribution of gut commensals to the emergence of antibiotic-resistant pathogens.
Main Methods:
- Microbiota-wide studies utilizing advanced sequencing technologies.
- Analysis of gene transfer events such as conjugation and transduction within the gut environment.
- Comparative genomics to identify shared resistance determinants between commensals and pathogens.
Main Results:
- Antibiotic resistance genes are widespread in the human gut microbiota, primarily residing in anaerobic commensals.
- Horizontal gene transfer, including antibiotic resistance genes, is frequent among gut commensals.
- Transfer of resistance genes from commensals to opportunistic pathogens is infrequent but significant, as seen with vancomycin resistance in Enterococcus faecium.
Conclusions:
- The gut microbiota acts as a reservoir for antibiotic resistance genes.
- While horizontal gene transfer primarily occurs within commensal populations, it can facilitate the emergence of multi-drug resistant pathogens.
- Understanding gut resistome dynamics is crucial for combating antibiotic resistance.
More Related Videos
09:31Visualization of Gut Microbiota-host Interactions via Fluorescence In Situ Hybridization, Lectin Staining, and Imaging
Published on: July 9, 2021
10.1K
04:56Detection of Helicobacter pylori Infection and Antibiotic Resistance via Stool Quantitative Polymerase Chain Reaction Analysis
Published on: May 16, 2025
1.5K
Related Concept Videos
01:27Microbiota of the Stomach and Small Intestine
60
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,...
60
01:22Introduction to the Human Microbiota
101
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,...
101
01:27Microbiota of the Large Intestine
74
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...
74
01:18Functions of the Gut Microbiota
89
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...
89
01:22Probiotics
231
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...
231
01:29Microbiota of the Respiratory Tract
40
The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more...
40