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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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Reticular Dermis01:15

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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
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Accessory Structures of the Skin: Nails01:05

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Nails are one of the important accessory structures of the skin. They are hard, protective structures that cover the dorsal surface of the distal phalanges of fingers and toes. Nails are composed of specialized keratinized cells and serve various functions, including protection, sensation, and manual dexterity.
The main components of a nail include the following.
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Papillary Dermis01:11

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Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
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Accessory Structures of the Skin: Hair Growth and Types01:20

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Hair growth begins with the production of keratinocytes by the basal cells of the hair bulb. As new cells are deposited at the hair bulb, the hair shaft is pushed through the follicle toward the surface. Keratinization is completed as the cells are pushed to the skin surface to form the shaft of hair that is externally visible. The external hair is completely dead and composed entirely of keratin. Hair can be cut or shaven without damaging the hair structure because the cut is superficial. Most...
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Accessory Structures of the Skin: Hair and Hair Follicles01:16

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Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
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[Trichophyton equinum meets Chanel].

Katharina Antonia Drerup1, Thomas Schwarz2, Jochen Brasch2

  • 1Klinik für Dermatologie, Venerologie und Allergologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Arnold-Heller-Str. 3, 24105, Kiel, Deutschland. kdrerup@dermatology.uni-kiel.de.

Dermatologie (Heidelberg, Germany)
|June 6, 2023
PubMed
Summary

A rare human infection caused by Trichophyton equinum, a fungus typically found in horses, is reported. The case highlights unusual morphological features of the dermatophyte, T. equinum, not previously documented.

Keywords:
Dermatophyte infectionEpidemiologyNicotinic acidsTinea corporisTreatmentTrichophyton equinum

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Area of Science:

  • Medical Mycology
  • Dermatology
  • Veterinary Medicine

Background:

  • Trichophyton equinum is a zoophilic dermatophyte commonly found in horses.
  • Human infections with T. equinum are rare, despite horses being the primary reservoir.
  • Understanding the transmission and characteristics of zoophilic fungi is crucial for public health.

Observation:

  • This case report details a rare instance of human infection by Trichophyton equinum.
  • The isolated T. equinum strain exhibited unique morphological characteristics, including spiral hyphae and nodal organs.
  • These features were not previously documented for this dermatophyte species.

Findings:

  • The study confirms that Trichophyton equinum can cause infections in humans, albeit infrequently.
  • Novel morphological and physiological characteristics of the T. equinum strain were identified and documented.
  • The unique strain was successfully isolated and deposited in a microbial collection for further study.

Implications:

  • This case expands the known clinical spectrum of Trichophyton equinum.
  • The identification of new morphological features may aid in the diagnosis and classification of dermatophytes.
  • Further research into T. equinum is warranted to understand its zoonotic potential and host-pathogen interactions.