Skin Infections and Skin Defence Overview
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Questions and Answers

What is the primary function of beta defensins in the skin?

  • To produce keratinocytes
  • To maintain the skin's acidity
  • To destroy microorganisms by disrupting their cell membranes (correct)
  • To form a waterproof barrier

    • Which layer of the skin is primarily affected by dermatophyte infections like tinea or ringworm?

  • Hypodermis
  • Sebaceous glands
  • Dermis
  • Epidermis (correct)

    • How does the dry environment of the skin help prevent infections?

  • Promotes overgrowth of potential pathogens
  • Limits colonization by certain microorganisms (correct)
  • Enhances entry of infectious agents
  • Facilitates colonization by certain microorganisms

    • In deeper skin conditions like furuncles and carbuncles, where do these infections primarily invade?

    <p>Dermis</p> Signup and view all the answers

    Which skin component is responsible for forming a waterproof barrier that blocks the entry of infectious agents?

    <p>Keratinocytes</p> Signup and view all the answers

    What is the function of the stratum corneum in the skin?

    <p>To provide a protective layer made up of keratinocytes</p> Signup and view all the answers

    What is the role of sebum in skin infection prevention?

    <p>It lowers skin pH, inhibiting many microorganisms.</p> Signup and view all the answers

    Which of the following skin-resident immune cells is NOT involved in preventing skin infections?

    <p>Eosinophils</p> Signup and view all the answers

    How do sweat glands contribute to preventing skin infections?

    <p>Produce lysozyme to break down bacterial cell walls.</p> Signup and view all the answers

    Where do most of the skin microbiome reside within the skin structure?

    <p>Superficial stratum corneum and upper hair follicles</p> Signup and view all the answers

    Which type of bacteria are key colonizers in the human skin microbiome?

    <p>Corynebacterium</p> Signup and view all the answers

    How do skin normal flora help prevent pathogen colonization?

    <p>By blocking attachment to the skin surface</p> Signup and view all the answers

    Which skin microorganism is the most prevalent?

    <p>Staphylococcus epidermidis</p> Signup and view all the answers

    What type of bacteria are typically found in skin moist regions?

    <p>Gram-negative bacilli</p> Signup and view all the answers

    Which of the following is a primary bacterial agent causing skin infections?

    <p>Propionibacterium acnes</p> Signup and view all the answers

    Which toxin is responsible for Scalded Skin Syndrome?

    <p>Epidermolytic toxin</p> Signup and view all the answers

    Impetigo, Scarlet fever, and Erysipelas are caused by which pathogenic bacteria?

    <p>Streptococcus pyogenes</p> Signup and view all the answers

    What is the main fungus found on the skin according to the text?

    <p>Candida</p> Signup and view all the answers

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