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Related Concept Videos

Skin Diseases and Disorders01:23

Skin Diseases and Disorders

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.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Hypersensitivities01:30

Hypersensitivities

Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Giardiasis01:12

Giardiasis

Giardiasis is a globally prevalent intestinal infection caused by the protozoan parasite Giardia duodenalis (also known as G. lamblia or G. intestinalis). This flagellated protozoan is the most frequently identified intestinal parasite in the United States and worldwide. Transmission primarily occurs via the fecal-oral route, with infection arising from ingestion of water or food contaminated with cysts. Individuals in low-resource settings, international travelers, outdoor enthusiasts, daycare...
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...
Hypersensitivity Reactions: Delayed Hypersensitivity Reactions01:29

Hypersensitivity Reactions: Delayed Hypersensitivity Reactions

Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...
Trichomoniasis01:18

Trichomoniasis

Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.

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Related Experiment Video

Updated: Jul 7, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

Behçet's disease.

Ilan Krause1, Abraham Weinberger

  • 1Department of Medicine E, Rabin Medical Center, Beilinson Hospital, Sackler Faculty of Medicine, Tel-Aviv University, Israel. ikrause@post.tau.ac.il

Current Opinion in Rheumatology
|February 19, 2008
PubMed
Summary

Recent research highlights genetic and immunologic factors in Behçet's disease, including specific gene alleles and immune responses. Novel serological markers and autoantigens are emerging as key areas for future investigation in Behçet's disease.

Area of Science:

  • Immunology
  • Genetics
  • Rheumatology

Background:

  • Behçet's disease is a complex multisystem inflammatory disorder.
  • Understanding its genetic and immunologic underpinnings is crucial for effective management.

Purpose of the Study:

  • To review recent scientific advancements in Behçet's disease epidemiology, genetics, pathogenesis, and treatment.
  • To highlight key findings from genetic and immunologic studies.

Main Methods:

  • Review of recent genetic association studies.
  • Analysis of immunologic findings, including T helper cell responses.
  • Evaluation of emerging treatment strategies and clinical manifestations.

Main Results:

  • Specific gene polymorphisms (e.g., TNF-alpha, IL-10, IL-8, CD28, eNOS) are associated with Behçet's disease susceptibility, with ethnic variations noted.

Related Experiment Videos

Last Updated: Jul 7, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

  • A strong T helper type 1 immune response is characteristic, though T helper type 2 may also contribute.
  • Anti-tumor necrosis factor therapy shows increasing efficacy; Cyclosporin A may be linked to neuro-Behçet.
  • Cardiac and neurological manifestations, including headaches, are prevalent.
  • Novel markers like anti-Saccharomyces cerevisiae antibodies and selenium binding protein are under investigation.
  • Conclusions:

    • Significant progress has been made in understanding the immunologic and genetic basis of Behçet's disease.
    • Further research into novel serological markers and autoantigens is warranted.
    • Continued investigation into treatment efficacy and disease manifestations is essential.