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Bacterial Gastroenteritis01:18

Bacterial Gastroenteritis

Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid receptor...
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Cholera is an acute gastrointestinal disease caused by the Gram-negative bacterium Vibrio cholerae. It is transmitted primarily via the fecal-oral route through the ingestion of contaminated water or food.Vibrio cholerae is a motile, Gram-negative bacterium of the family Vibrionaceae, primarily associated with waterborne outbreaks in areas with inadequate sanitation. Although over 200 serogroups of V. cholerae exist, only O1 and O139 are responsible for epidemic cholera. The O1 serogroup,...
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Stringent Response in E. coli

Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
Amebiasis01:28

Amebiasis

Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...
Reservoir of Infection01:30

Reservoir of Infection

Infectious diseases arise from intricate interactions between pathogens and their reservoirs. A reservoir of infection refers to the natural habitat where a pathogen lives, grows, and multiplies, serving as a continual source of infection. Reservoirs are broadly classified as either living or nonliving, and each plays a unique role in disease transmission, significantly influencing public health interventions and control strategies.Humans act as reservoirs for a wide array of pathogens,...
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Related Experiment Video

Updated: Jun 2, 2026

Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing
09:44

Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing

Published on: December 23, 2022

Escherichia coli.

David S Goodsell1

  • 1Department of Molecular Biology, The Scripps Research Institute, La Jolla, California. goodsell@scripps.edu.

Biochemistry and Molecular Biology Education : a Bimonthly Publication of the International Union of Biochemistry and Molecular Biology
|May 14, 2011
PubMed
Summary
This summary is machine-generated.

A detailed illustration of the Escherichia coli cell was created using diverse biological data. This visualization shows the precise location and form of macromolecules within the bacterium at one million times magnification.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Structural Biology

Background:

  • Illustrations are crucial for understanding complex cellular structures.
  • Visualizing macromolecules in their native cellular environment presents significant challenges.

Purpose of the Study:

  • To describe the scientific basis for a textbook illustration of an Escherichia coli cell.
  • To demonstrate the integration of diverse data types for molecular visualization.

Main Methods:

  • Compilation of data from biochemistry, electron microscopy, and X-ray crystallography.
  • Digital reconstruction and visualization techniques to create a high-magnification image.

Main Results:

  • A detailed illustration of a portion of Escherichia coli at 1,000,000x magnification.
  • Depiction of the location and three-dimensional form of individual macromolecules within the cell.

Conclusions:

  • Diverse biological data can be synthesized to create accurate cellular illustrations.
  • Such visualizations enhance the understanding of molecular organization and function within bacteria.