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Related Concept Videos

Components of Stress01:23

Components of Stress

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Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
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Components of Language01:24

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Language, whether spoken, signed, or written, consists of specific components: lexicon and grammar. The lexicon is the vocabulary of a language, comprising its words. Grammar is the set of rules used to convey meaning through the lexicon. For example, English grammar adds “-ed” to most verbs to indicate past tense. Words are formed by combining phonemes, which are the basic sound units of a language. Different languages have different sets of phonemes (e.g., “ah” vs.
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Normal and Tangetial Components: Problem Solving01:24

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Consider a man with a mass of 70 kg seated in a chair connected to a pin support through a member BC. If the man maintains an upright position, the task is to determine the horizontal and vertical reactions of the chair on the man when the member makes a 45° angle with the horizontal. At this moment, the man has a speed of 5 m/s, increasing at a rate of 1 m/s².
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Vector Components in the Cartesian Coordinate System01:29

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Vectors are usually described in terms of their components in a coordinate system. Even in everyday life, we naturally invoke the concept of orthogonal projections in a rectangular coordinate system. For example, if someone gives you directions for a particular location, you will be told to go a few km in a direction like east, west, north, or south, along with the angle in which you are supposed to move. In a rectangular (Cartesian) xy-coordinate system in a plane, a point in a plane is...
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Related Experiment Video

Updated: Feb 9, 2026

A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection
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A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection

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Targeting Clostridium difficile Surface Components to Develop Immunotherapeutic Strategies Against Clostridium

Séverine Péchiné1, Jean F Bruxelle1, Claire Janoir1

  • 1EA 4043, Unités Bactéries Pathogènes et Santé, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France.

Frontiers in Microbiology
|June 8, 2018
PubMed
Summary

New immunization strategies targeting Clostridium difficile surface components show promise for preventing and treating infections. Both passive and active immunization approaches are being explored to combat this growing public health threat.

Keywords:
Clostridium difficilepassive immunotherapiesprotectionsurface componentsvaccines

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Area of Science:

  • Microbiology
  • Immunology
  • Infectious Diseases

Background:

  • Clostridium difficile infection (CDI) poses a significant challenge due to rising antibiotic resistance.
  • Surface components of C. difficile, beyond toxins, act as colonization factors and are immunogenic.
  • Novel therapeutic and preventive strategies are urgently needed.

Purpose of the Study:

  • To review passive and active immunization strategies against C. difficile surface components.
  • To evaluate the efficacy of these strategies in combating C. difficile infections.
  • To highlight potential avenues for new vaccine development.

Main Methods:

  • Review of studies on passive immunization using antisera, specific surface component antibodies, and immunoglobulin concentrates.
  • Review of studies on active immunization using bacterial extracts, spore proteins, and vegetative cell surface components.
  • Analysis of vaccine assays in various animal models (hamster, mouse) via parenteral and mucosal routes.

Main Results:

  • Passive immunization with antibodies against C. difficile surface components demonstrated protective effects in animal models.
  • Human trials utilized polyvalent immunoglobulins, and bovine immunoglobulin concentrates were evaluated.
  • Active immunization strategies targeting various surface components showed promising results in animal models.
  • Both parenteral and mucosal immunization routes yielded encouraging outcomes.

Conclusions:

  • Immunization targeting C. difficile surface components offers a viable strategy for infection control.
  • Both passive and active immunization approaches have demonstrated efficacy in preclinical and clinical evaluations.
  • These findings support the development of novel vaccines and immunotherapies against C. difficile.