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The Skin Microbiota01:27

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The human skin serves as a complex ecosystem inhabited by a diverse community of microorganisms, including bacteria, fungi, and viruses. This microbiome plays a critical role in maintaining skin health and defending against pathogenic invaders. The composition of microbial communities varies significantly across different regions of the body, influenced primarily by the local levels of moisture and sebum.Regional Variation in Skin MicrobiotaCutibacterium acnes predominantly colonizes sebaceous...
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A sebaceous gland is a type of oil gland found almost all over the skin ( except palms and soles) and helps lubricate and waterproof the skin and hair. Most sebaceous glands are associated with hair follicles. They generate and excrete sebum, a mixture of lipids, onto the skin surface, thereby naturally lubricating the dry and dead layer of keratinized cells of the stratum corneum, keeping it pliable.
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Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
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Acne is a multifactorial skin condition primarily affecting adolescents and young adults, with a global prevalence estimated to exceed 75% in this demographic. The condition is characterized by the formation of comedones (blackheads and whiteheads), papules, pustules, nodules, and, in severe cases, cysts, particularly in areas rich in sebaceous glands such as the face, neck, chest, and back. The pathogenesis involves increased sebum production, follicular hyperkeratinization, colonization by...
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Malassezia-Can it be Ignored?

Ambujavalli Balakrishnan Thayikkannu1, Anupma Jyoti Kindo1, Mahalakshmi Veeraraghavan2

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Malassezia yeasts are common fungi that cause skin infections in susceptible individuals. Advances in molecular techniques are improving research into their role in various diseases.

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Area of Science:

  • Medical Mycology
  • Dermatology
  • Infectious Diseases

Background:

  • Malassezia yeasts are lipophilic fungi, with 14 known species, commonly found as commensals.
  • They cause chronic, recurrent infections in predisposed individuals and rarely severe systemic illnesses.
  • Despite being known for over 150 years, research has been limited by cultivation challenges.

Purpose of the Study:

  • To highlight the expanding role of Malassezia yeasts in clinical scenarios.
  • To emphasize the impact of recent taxonomic revisions and new species identification.
  • To underscore the importance of molecular techniques in overcoming research limitations.

Main Methods:

  • Review of existing literature on Malassezia taxonomy and clinical significance.
  • Discussion of challenges in traditional culture-based research methods.
  • Emphasis on the application of modern molecular analysis techniques.

Main Results:

  • Seven new Malassezia species have been identified since the last revision, increasing the total to 14.
  • Malassezia's immune evasion and virulence contribute to a broader spectrum of diseases.
  • Recent studies implicate Malassezia in common conditions like atopic dermatitis.

Conclusions:

  • Molecular techniques are crucial for advancing Malassezia research, overcoming previous limitations.
  • Further investigation into Malassezia characteristics and clinical implications is warranted.
  • Understanding Malassezia is increasingly important for managing various dermatological and systemic infections.