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Related Concept Videos

Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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Cell-mediated Immune Responses01:40

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Stages of Infection01:26

Stages of Infection

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Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
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Infection01:20

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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
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A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection
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The interplay between host immunity and Clostridioides difficile infection.

Danyang Li1, Pedro H V Saavedra1

  • 1Department of Biology, Northeastern University, Boston, Massachusetts, USA.

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Summary

Clostridioides difficile infection (CDI) poses a significant health threat. Understanding host immunity is crucial for developing new treatments against this challenging enteric inflammation and recurrent infections.

Keywords:
Clostridioides difficilehost immunityhost-pathogen interactionsinfectious diseasemicrobiota

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Area of Science:

  • Microbiology
  • Immunology
  • Gastroenterology

Background:

  • Clostridioides difficile infection (CDI) is a leading cause of healthcare-associated infectious enteric inflammation globally.
  • Gut microbiome disruption facilitates C. difficile colonization, toxin production, and intestinal damage.
  • Antibiotic resistance and lack of vaccines complicate CDI treatment and increase recurrence risk.

Purpose of the Study:

  • To review the history and recent findings on host immune mechanisms against C. difficile.
  • To elucidate cellular and molecular pathways involved in protection from CDI.
  • To identify current knowledge gaps and future research directions in CDI immunity.

Main Methods:

  • Literature review focusing on host immunity to C. difficile.
  • Analysis of innate and adaptive immune responses in CDI pathogenesis.
  • Synthesis of historical and contemporary research findings.

Main Results:

  • Both innate and adaptive immunity play roles in host defense against C. difficile.
  • Specific immune mechanisms contributing to protection are being elucidated.
  • Understanding these mechanisms is key to novel therapeutic development.

Conclusions:

  • Significant progress has been made in understanding host immunity to C. difficile.
  • Further research is needed to fully comprehend the cellular and molecular mechanisms.
  • Elucidating these pathways will guide the development of new vaccines and therapies for CDI.