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Related Concept Videos

Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
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Defense Mechanism Against Infection01:26

Defense Mechanism Against Infection

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Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
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Infection01:20

Infection

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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.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
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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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Immunological Memory01:23

Immunological Memory

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
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Healthcare Associated Infections II: Preventive Measures01:22

Healthcare Associated Infections II: Preventive Measures

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Essential infection prevention measures are based on the knowledge of the infection chain, the modes of transmission in healthcare settings, and the use of the best practices in all healthcare settings. Compulsory public reporting of healthcare-associated infection rates is needed to allow individuals and the community to make informed choices regarding selecting a healthcare facility.
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Related Experiment Video

Updated: Jul 11, 2025

Opsonophagocytic Killing Assay to Assess Immunological Responses Against Bacterial Pathogens
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Opsonophagocytic Killing Assay to Assess Immunological Responses Against Bacterial Pathogens

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"Training immunity" against nosocomial pathogens.

Alexandra Schäfer1, David R Martinez2

  • 1Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.

Science Immunology
|November 6, 2023
PubMed
Summary
This summary is machine-generated.

Non-antigen vaccines activate the innate immune system, offering broad protection against deadly hospital-acquired bacterial and fungal infections. This approach improves survival rates by bolstering the body's natural defenses.

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Sublingual Immunotherapy as an Alternative to Induce Protection Against Acute Respiratory Infections
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A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii
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Related Experiment Videos

Last Updated: Jul 11, 2025

Opsonophagocytic Killing Assay to Assess Immunological Responses Against Bacterial Pathogens
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Sublingual Immunotherapy as an Alternative to Induce Protection Against Acute Respiratory Infections
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A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii
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Area of Science:

  • Immunology
  • Infectious Diseases
  • Vaccinology

Background:

  • Hospital-acquired infections pose significant mortality risks.
  • Current treatments often face antimicrobial resistance challenges.
  • Broad-spectrum innate immune activation offers a novel therapeutic strategy.

Purpose of the Study:

  • To investigate the efficacy of non-antigen vaccines in combating hospital-acquired pathogens.
  • To evaluate the role of innate immune responses in vaccine-induced protection.
  • To determine the impact on mortality rates.

Main Methods:

  • Development of non-antigen vaccines designed for broad innate immune stimulation.
  • Infection models using common hospital-acquired bacterial and fungal pathogens.
  • Assessment of survival rates and immune markers post-vaccination.

Main Results:

  • Vaccination significantly reduced mortality in challenged models.
  • Broad activation of innate immune pathways was observed.
  • Protection extended against both bacterial and fungal infections.

Conclusions:

  • Non-antigen vaccines represent a promising strategy for preventing severe hospital-acquired infections.
  • Harnessing innate immunity can provide broad-spectrum protection against diverse pathogens.
  • This approach may overcome limitations of traditional antigen-specific vaccines.