Subcutaneous Mycoses Quiz

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Animaldoc2013
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  • 1/10 questions

    Which of these conditions is not considered a subcutaneous mycosis?

    • Sporotrichosis
    • Mycetoma
    • Chromoblastomycosis
    • Tinea pedis
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  • 2. 

    Which is a typical pathogen responsible for subcutaneous mycoses?

    • Candida albicans

    • Sporothrix schenckii

    • Histoplasma capsulatum

    • Aspergillus fumigatus

    Correct Answer
    A. Sporothrix schenckii
    Explanation
    Sporothrix schenckii is the most common pathogen associated with sporotrichosis, a subcutaneous mycosis. This dimorphic fungus is primarily found in soil and plant matter, especially in tropical and subtropical climates. It enters the body through minor skin injuries, typically while handling vegetation or soil. Sporothrix causes a chronic infection characterized by nodular lesions, often following lymphatic channels. The fungus's ability to adapt to both environmental and host conditions makes it a successful pathogen in subcutaneous tissue. Correct identification of Sporothrix schenckii as the causative agent is key to selecting appropriate antifungal treatment for sporotrichosis.

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  • 3. 

    Which of these subcutaneous fungal infections is commonly found in people working with soil and plants?

    • Candidiasis

    • Tinea

    • Sporotrichosis

    • Aspergillosis

    Correct Answer
    A. Sporotrichosis
    Explanation
    Sporotrichosis, caused by Sporothrix schenckii, is often associated with people who handle soil, plants, and organic materials, making it common among gardeners, farmers, and forestry workers. The fungus is found in decaying vegetation and enters through cuts or abrasions on the skin. After entry, the infection typically manifests as a localized skin lesion but can spread along lymphatic channels. Understanding the association between occupational exposure and sporotrichosis is critical for identifying at-risk populations and preventing the disease, especially since proper skin protection can minimize fungal entry through wounds.

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  • 4. 

    Eumycetoma is a chronic subcutaneous mycosis. What part of the body does it mainly affect?

    • Lungs

    • Lymph nodes

    • Hands and feet

    • Brain

    Correct Answer
    A. Hands and feet
    Explanation
    Eumycetoma is a chronic subcutaneous mycosis that typically affects the hands and feet, where minor injuries are common, allowing fungi from the environment to enter. This condition results in swelling, abscesses, and draining sinuses that can cause severe deformities. The feet are particularly vulnerable due to frequent contact with soil and unintentional trauma. Over time, the infection can destroy underlying bone and soft tissue. Eumycetoma is more common in tropical regions, and its progression requires both medical and sometimes surgical interventions to prevent further damage to the affected extremities.

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  • 5. 

    Which type of fungal infection is characterized by affecting deeper layers of the skin?

    • Superficial mycoses

    • Systemic mycoses

    • Cutaneous mycoses

    • Subcutaneous mycoses

    Correct Answer
    A. Subcutaneous mycoses
    Explanation
    Subcutaneous mycoses affect the deeper layers of the skin, including the dermis and subcutaneous tissue, unlike superficial or cutaneous mycoses, which impact only the outer layers. These infections often lead to chronic disease because the fungi enter through trauma or cuts, and they are difficult to treat due to their deep localization. As a result, subcutaneous mycoses often cause long-term conditions, such as nodules, ulcers, or granulomas, requiring a targeted therapeutic approach. Their persistence in tissues highlights the need for more aggressive treatment strategies compared to fungal infections that remain superficial or localized to the skin's surface.

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  • 6. 

    What is a common way subcutaneous mycoses enter the body?

    • Inhalation

    • Skin contact

    • Through wounds or cuts

    • Ingestion

    Correct Answer
    A. Through wounds or cuts
    Explanation
    The primary route of entry for subcutaneous mycoses is through wounds, cuts, or abrasions in the skin. Unlike other fungal infections that may be inhaled or acquired through surface contact, these fungi enter directly into the subcutaneous tissue following skin trauma. Since the fungi reside in soil, plants, or organic material, exposure through direct inoculation during outdoor activities, such as gardening or farming, is common. Once in the tissue, the fungus can spread locally, leading to chronic infections. Understanding the entry route is crucial for preventing infection and identifying at-risk populations, especially those handling soil or plants.

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  • 7. 

    What is the primary treatment for subcutaneous mycoses?

    • Antibiotics

    • Antifungal therapy

    • Antiviral medication

    • Surgical removal

    Correct Answer
    A. Antifungal therapy
    Explanation
    Antifungal therapy is the primary treatment for subcutaneous mycoses due to the fungal nature of these infections. Antifungal drugs, such as itraconazole or amphotericin B, target the fungal cells specifically by disrupting their cell membranes or inhibiting essential metabolic pathways. While surgical removal might be necessary in severe cases, particularly for large, chronic lesions, antifungal therapy is usually the first line of defense. Successful treatment depends on early diagnosis and the ability of the antifungal drug to penetrate deep tissues where the fungus resides. Long-term antifungal therapy may be needed to prevent recurrence.

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  • 8. 

    How do subcutaneous mycoses generally spread in the body?

    • Through the bloodstream

    • Direct extension to deeper tissues

    • Airborne transmission

    • Lymphatic spread

    Correct Answer
    A. Direct extension to deeper tissues
    Explanation
    Subcutaneous mycoses primarily spread through direct extension into deeper tissues rather than through systemic pathways like the bloodstream. After fungal inoculation through skin trauma, the infection stays localized but gradually moves into the subcutaneous tissues, causing chronic inflammation and forming nodules or abscesses. Unlike systemic fungal infections, subcutaneous mycoses rarely spread to distant organs. This localized spread makes surgical intervention sometimes necessary to remove infected tissue, in combination with antifungal therapy. Understanding the mode of spread helps in planning treatment, focusing on controlling the local infection before it causes more extensive tissue damage.

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  • 9. 

    What is a diagnostic method often used to identify subcutaneous mycoses?

    • X-ray

    • Fungal culture

    • Blood test

    • Skin biopsy

    Correct Answer
    A. Skin biopsy
    Explanation
    Skin biopsy is an important diagnostic method for subcutaneous mycoses because it allows direct visualization and culture of the fungal elements within tissue. Since these infections affect deeper skin layers, non-invasive tests often fail to provide sufficient information. A biopsy can reveal characteristic features like fungal hyphae or sclerotic cells, helping to distinguish between different types of subcutaneous mycoses. Biopsy also enables histopathological examination, confirming the diagnosis and guiding treatment. While fungal cultures are also valuable, they require time for results, making skin biopsy a faster and more direct diagnostic tool in clinical settings.

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  • 10. 

    Chromoblastomycosis is a form of subcutaneous mycosis. What feature is it known for?

    • Nodular lesions

    • Ulcers on the skin

    • Granuloma formation

    • Chronic cough

    Correct Answer
    A. Nodular lesions
    Explanation
    Chromoblastomycosis is a chronic fungal infection that produces distinctive, wart-like, or nodular lesions on the skin. These lesions often appear after traumatic implantation of the fungus into the skin. The nodular nature of chromoblastomycosis is a result of the immune response to the infection, where the body forms granulomas and nodules to contain the fungi. Over time, these lesions can become hardened and disfiguring. Chromoblastomycosis is slow to progress but can persist for years without treatment, leading to severe skin damage. Its nodular presentation distinguishes it from other subcutaneous mycoses and is key for clinical diagnosis.

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  • Sep 23, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 20, 2010
    Quiz Created by
    Animaldoc2013
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