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Related Concept Videos

Skin Diseases and Disorders01:23

Skin Diseases and Disorders

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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
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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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Surface Membrane Barriers01:18

Surface Membrane Barriers

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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
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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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Anatomy of the Intestines01:23

Anatomy of the Intestines

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Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
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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.
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Infecting Mice with Malassezia spp. to Study the Fungus-Host Interaction
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Skin microbiome and dermatologic disorders.

Tiffany C Scharschmidt1, Julia A Segre2

  • 1Department of Dermatology, University of California, San Francisco, San Francisco, California, USA.

The Journal of Clinical Investigation
|February 3, 2025
PubMed
Summary
This summary is machine-generated.

The human skin microbiome, comprising bacteria and fungi, plays a crucial role in immunity and barrier function. Understanding these microbial communities offers new therapeutic avenues for skin disorders.

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Area of Science:

  • Dermatology
  • Microbiology
  • Immunology

Background:

  • Human skin harbors a diverse microbiome of commensal bacteria and fungi.
  • This microbiome acts as a barrier against pathogens and influences immune responses.
  • Recent research integrates microbiome, immunity, and tissue integrity, particularly in conditions like atopic dermatitis.

Purpose of the Study:

  • To review microbiome shifts in cutaneous disorders.
  • To explore the potential of the skin microbiome for novel therapeutic strategies.

Main Methods:

  • Review of current literature on skin microbiome, immunity, and tissue integrity.
  • Analysis of microbiome sequencing and functional studies.
  • Integration of findings related to common skin disorders.

Main Results:

  • The skin microbiome exhibits significant diversity and selectivity.
  • Specific microbial strains can modulate immune responses, community structure, and barrier function.
  • Disruptions in the microbiome are linked to skin disorders like atopic dermatitis.

Conclusions:

  • The skin microbiome is integral to skin health and disease.
  • Investigating microbiome alterations can reveal new therapeutic targets for cutaneous conditions.