What Do You Know About Mycobacterium? Trivia Quiz

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| By Chad Jessup
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Chad Jessup
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Quizzes Created: 1 | Total Attempts: 211
| Attempts: 211
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  • 1/5 Questions

    Scrofuloderma is most commonly associated with an underlying infection of what organ system?

    • Lymph nodes
    • Spine
    • Lungs
    • Gastrointestinal tract
    • No underlying systemic disease
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About This Quiz

What Do You Know About Mycobacterium? These pathogens are to blame when it comes to some of the serious diseases that affect mammals. Do you know enough about these classes of bacteria to pass this special quiz? The best way to find out is to take the actual quiz. Do give it a shot and see what wonders you may learn.

What Do You Know About Mycobacterium? Trivia Quiz - Quiz

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  • 2. 

    A 23-year-old Peace Corps volunteer returns from Africa with an extensive undermined, non-healing ulcerations on the right lower leg. Which of the following infections is the most likely cause of this presentation?

    • M. marinum

    • M. kansasii

    • M. chelonei

    • M. ulcerans

    • Leishmania donovani

    Correct Answer
    A. M. ulcerans
    Explanation
    M. ulcerans is the most likely cause of the extensive undermined, non-healing ulcerations on the right lower leg in this 23-year-old Peace Corps volunteer who returned from Africa. M. ulcerans is a bacterium that causes Buruli ulcer, a chronic skin infection commonly found in tropical and subtropical regions, including parts of Africa. The presentation of extensive ulcerations and non-healing wounds is characteristic of Buruli ulcer, making M. ulcerans the most likely infection in this case.

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  • 3. 

    Which of the following statements best describes the pathogenesis of scrofuloderma?

    • Hematogenous spread of M. tuberculosis from a distant site of infection

    • Autoinoculation of M. tuberculosis from advanced pulmonary tuberculosis

    • Contiguous spread from an underlying focus of tuberculous lymphadenitis

    • Primary incoculation of M. tuberculosis in a sensitized host

    • An cutaneous manifestation of military tuberculosis

    Correct Answer
    A. Contiguous spread from an underlying focus of tuberculous lymphadenitis
    Explanation
    Contiguous spread from an underlying focus of tuberculous lymphadenitis is the best description of the pathogenesis of scrofuloderma. Scrofuloderma is a type of cutaneous tuberculosis that occurs when the infection spreads from nearby infected lymph nodes. This is different from other forms of cutaneous tuberculosis, such as primary inoculation or hematogenous spread, which involve different routes of infection. Therefore, the most accurate explanation is that scrofuloderma is caused by the contiguous spread of Mycobacterium tuberculosis from an underlying focus of tuberculous lymphadenitis.

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  • 4. 

    This is the term that is used from tuberculosis of the skin and is spread by hematogenous, lymphatic, or contiguous spread. The clinical characteristic is a brownish-red plaque, apple jelly color on diascopy.

    • Lupus vulgaris

    • Scrofuloderma

    • Tuberculous Gumma

    • Tuberculosis verrucosa cutis

    • Tuberculosis cutis orificialis

    Correct Answer
    A. Lupus vulgaris
    Explanation
    Lupus vulgaris is the correct answer because it is a term used to describe tuberculosis of the skin that is spread through hematogenous, lymphatic, or contiguous spread. The clinical characteristic of lupus vulgaris is a brownish-red plaque with an apple jelly color on diascopy.

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  • 5. 

    Which of the following skin manifestations of tuberculosis infection is a tuberculid?

    • Erythema induratum of Bazin

    • Lupus vulgaris

    • Miliary TB

    • Scrofuloderma

    • Tuberculous gumma

    Correct Answer
    A. Erythema induratum of Bazin
    Explanation
    Erythema induratum of Bazin is a skin manifestation of tuberculosis infection that is considered a tuberculid. Tuberculids are immunologically mediated skin reactions to tuberculosis infection, rather than direct involvement of the skin by the bacteria. Erythema induratum of Bazin typically presents as painful nodules on the lower legs of young women, and is associated with a positive tuberculin skin test. This manifestation is thought to be a delayed hypersensitivity reaction to mycobacterial antigens, and is not contagious.

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 11, 2014
    Quiz Created by
    Chad Jessup
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