10th Class Skin Infections
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Questions and Answers

Which type of specimen collection is preferred by laboratories for diagnosing skin infections?

  • Tissue biopsy (correct)
  • Wound swabs
  • Materials from surgical debridement drainage samples
  • Swabs of abscesses
  • Which antibiotic is used to treat infections caused by Streptococcus?

  • Cephalexin
  • Vancomycin
  • Penicillin (correct)
  • Ciprofloxacin
  • What does MRSA stand for?

  • Methicillin-resistant Streptococcus aureus
  • Methicillin-resistant Staphylococcus aureus (correct)
  • Methicillin-resistant Staphylococcus epidermidis
  • Methicillin-sensitive Staphylococcus aureus
  • What is the preferred treatment for Staphylococcus aureus infections?

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

    Which of the following organisms is resistant to vancomycin?

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

    Which organism is primarily responsible for causing abscesses?

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

    What commonly results from a previous follicular infection leading to deep folliculitis?

    <p>Boil (Furuncle)</p> Signup and view all the answers

    Which type of infection involves interconnected boils arising in a cluster of hair follicles?

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

    Which bacterium is responsible for acne through the breakdown of sebum?

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

    Which type of sample do laboratories prefer for diagnosing skin infections over swab samples?

    <p>Tissue samples from surgical debridement</p> Signup and view all the answers

    What treatment is typically given for infections caused by Streptococcus?

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

    Which of the following conditions is characterized by blocked pilosebaceous ducts turning into sacs?

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

    Which factor is NOT involved in the development of acne?

    <p>Interconnected boils</p> Signup and view all the answers

    Study Notes

    Skin Infections

    Laboratory Diagnosis

    • Tissue biopsy, aspiration, swabs of abscesses, wound swabs, and materials from surgical debridement drainage samples are used for specimen collection.
    • Laboratories prefer surgically obtained tissue samples, aspirate of closed abscesses, and an aliquot of pus or fluid rather than swab samples.

    Treatment

    • Streptococcus infections are treated with penicillin.
    • Staphylococcus aureus infections are treated with Vancomycin.

    Antibiotic Resistance Terminologies

    • MRSA: methicillin-resistant Staphylococcus aureus.
    • MSSA: methicillin-sensitive Staphylococcus aureus.
    • VRE: vancomycin-resistant enterococci.
    • VISA: vancomycin intermediate resistance S. aureus.
    • VRSA & VRSE: vancomycin-resistant S. aureus and S. epidermidis.
    • ESBL: Extended spectrum β-lactamase.
    • PRSP: penicillin-resistant S. pneumoniae.
    • Folliculitis can be caused by Candida albicans, particularly in immunocompromised hosts.
    • Abscesses are localized collections of pus in a cavity, often caused by S. aureus.
    • Boils (furuncles) are deep folliculitis, most commonly caused by S. aureus.
    • Carbuncles are interconnected boils arising in a cluster of hair follicles, often found on the nape of the neck and back.

    Acne

    • Acne is caused by Propionibacterium acnes.
    • It occurs during puberty due to hormonal changes, leading to increased sebum production, keratinization, and desquamation in pilosebaceous ducts.
    • P. acnes breaks down sebum to form fatty acids and peptides, causing inflammation.

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    Description

    This quiz covers the laboratory diagnosis and treatment of skin infections, including specimen collection and antibiotic therapies for specific bacterial causes.

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