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Microbiology Lecture: Superficial, Cutaneous, and Subcutaneous Mycoses
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Microbiology Lecture: Superficial, Cutaneous, and Subcutaneous Mycoses

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Questions and Answers

What is the characteristic of the nodules in White Piedra?

  • Smaller, yellowish nodules
  • Larger, softer, yellowish nodules (correct)
  • Smaller, blackish nodules
  • Harder, blackish nodules

    • What is the primary site of infection for dermatophytes?

  • Viable skin
  • Muscle tissue
  • Nerve tissue
  • Non-viable skin (correct)

    • What is the characteristic of the hyphae in dermatophyte infections?

  • Transparent, non-septate, branching
  • Hyaline, septate, branching (correct)
  • Pigmented, septate, spiral
  • Colorless, non-septate, linear

    • What is the common name for dermatophyte infections?

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

    What is the genus of fungi that includes the cause of Piedra?

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

    What is the typical appearance of the yeast and short hyphal forms of Malassezia furfur species complex?

    <p>Spaghetti and meatballs appearance</p> Signup and view all the answers

    What is the goal of treatment for Malassezia infection?

    <p>Reduce the cutaneous population to commensal level</p> Signup and view all the answers

    What is the name of the fungus that causes Tinea Nigra?

    <p>Hortaea werneckii</p> Signup and view all the answers

    What is the characteristic of Piedra?

    <p>A nodular infection of the hair shaft</p> Signup and view all the answers

    What is the primary cause of Pityriasis Versicolor?

    <p>Malassezia globosa and Malassezia furfur</p> Signup and view all the answers

    What is the name of the fungus that causes Black Piedra?

    <p>Piedraia hortae</p> Signup and view all the answers

    Which of the following is NOT a type of Cutaneous Mycoses?

    <p>Pityriasis versicolor</p> Signup and view all the answers

    What is the term used to group the various fungi that cause infections of the skin, hair, and nails?

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

    What is the characteristic appearance of Pityriasis versicolor under a microscope?

    <p>Clusters of thick-walled round budding yeast-like cells and short septate hyphae</p> Signup and view all the answers

    Which of the following is a type of Superficial Mycoses?

    <p>Piedra (Black and White)</p> Signup and view all the answers

    Which of the following fungi is associated with Piedra?

    <p>Hortaea werneckii</p> Signup and view all the answers

    Which of the following is a characteristic of Anthropophilic species?

    <p>Difficult to eradicate</p> Signup and view all the answers

    Which of the following is NOT a characteristic of geophilic and zoophilic dermatophytes?

    <p>Elicits relatively mild and chronic infections</p> Signup and view all the answers

    Which of the following fungi is associated with Tinea Nigra?

    <p>Piedraia hortae</p> Signup and view all the answers

    Which of the following is a characteristic of Pityriasis Versicolor?

    <p>White to yellow granules</p> Signup and view all the answers

    Which fungus is responsible for Pityriasis Versicolor?

    <p>Malassezia furfur</p> Signup and view all the answers

    What is the characteristic of Tinea Nigra?

    <p>Infects skin and nails</p> Signup and view all the answers

    Which type of Piedra is caused by Piedraia hortae?

    <p>White Piedra</p> Signup and view all the answers

    What is the characteristic of Microsporum spp. infections?

    <p>Infects hair and skin</p> Signup and view all the answers

    What is the characteristic of Trichophyton spp. infections?

    <p>Infects skin, hair, and nails</p> Signup and view all the answers

    What is the characteristic of the infection of Tinea Pedis?

    <p>It usually occurs as a chronic infection</p> Signup and view all the answers

    What happens to the hair in Tinea Capitis?

    <p>Hyphae grow downward on the nonliving portion of the hair</p> Signup and view all the answers

    What is the characteristic of the lesions of Tinea Corporis?

    <p>They have a clearing, scaly center surrounded by a red advancing border</p> Signup and view all the answers

    What is the characteristic of Tinea Cruris?

    <p>It is a type of skin infection that occurs in the groin area</p> Signup and view all the answers

    What is the term used to describe the chain of spores that form around the hair shaft in Tinea Capitis?

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

    What is the characteristic of Trichophyton rubrum's microconidia?

    <p>They are small and piriform</p> Signup and view all the answers

    What is the characteristic of Microsporum species' macroconidia?

    <p>They are echinulate and multicellular</p> Signup and view all the answers

    What is the reverse color of Trichophyton rubrum's colony on SDA?

    <p>Pink-red to red-wine</p> Signup and view all the answers

    What is the host of Microsporum canis?

    <p>Dogs and cats</p> Signup and view all the answers

    What is the characteristic of Trichophyton mentagrophytes' microconidia?

    <p>They are abundant in grape-like clusters</p> Signup and view all the answers

    What is the surface color of Trichophyton rubrum's colony on SDA?

    <p>Flat to slightly raised, white to cream</p> Signup and view all the answers

    What is the host of Trichophyton equinum?

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

    What is the characteristic of Trichophyton tonsurans' microconidia?

    <p>They are mostly elongate</p> Signup and view all the answers

    What is the characteristic of Microsporum species' conidia?

    <p>They are born singly</p> Signup and view all the answers

    What is the characteristic of Trichophyton mentagrophytes' macroconidia?

    <p>They are rare, 3-8 celled, and pencil-shaped</p> Signup and view all the answers

    What is the most common type of dermatophytosis?

    <p>Tinea Pedis</p> Signup and view all the answers

    What is a common complication of Tinea Pedis?

    <p>Secondary bacterial infection</p> Signup and view all the answers

    What is characterized by the formation of chains of arthroconidia?

    <p>Dermatophytosis of the glabrous skin</p> Signup and view all the answers

    What type of dermatophytosis affects the groin area?

    <p>Tinea Cruris</p> Signup and view all the answers

    What is a characteristic of Tinea Unguium?

    <p>Yellow, brittle, thickened, and crumbly nails</p> Signup and view all the answers

    What is the typical site of infection for Tinea Pedis?

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

    Which of the following dermatophytosis affects the nails?

    <p>Tinea Unguium</p> Signup and view all the answers

    What is the typical site of infection for Tinea Corporis?

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

    Which of the following dermatophytosis affects the groin area?

    <p>Tinea Cruris</p> Signup and view all the answers

    What is the typical site of infection for Tinea Manus?

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

    What type of mycoses involves the outer layer of skin and the top layer of the hair and nails?

    <p>Superficial Mycoses</p> Signup and view all the answers

    Which fungus infects skin and nails?

    <p>Epidermophyton floccosum</p> Signup and view all the answers

    What is the term for a fungal infection of the foot?

    <p>Tinea Pedis</p> Signup and view all the answers

    What is the term for a fungal infection of the body?

    <p>Tinea Corporis</p> Signup and view all the answers

    What is the primary site of infection for dermatophytes in human body?

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

    Which of the following is an example of a cutaneous mycoses?

    <p>All of the above</p> Signup and view all the answers

    What is the term for a fungal infection of the nail?

    <p>Tinea Unguium</p> Signup and view all the answers

    What is the characteristic of Tinea Manus?

    <p>Infection of the hand</p> Signup and view all the answers

    What is Tinea Cruris?

    <p>Infection of the groin area</p> Signup and view all the answers

    Which of the following is a type of cutaneous mycoses that affects the feet?

    <p>Tinea Pedis</p> Signup and view all the answers

    What is the mode of introduction of Cladophialophora carrionii into the skin?

    <p>Through trauma</p> Signup and view all the answers

    What is the characteristic of the lesions of chromoblastomycosis?

    <p>Verrucous and wart-like with extension along the draining lymphatics</p> Signup and view all the answers

    What is the diagnostic test for chromoblastomycosis?

    <p>Microscopic examination in KOH</p> Signup and view all the answers

    What is the treatment of choice for small lesions of chromoblastomycosis?

    <p>Surgical excision with wide margins</p> Signup and view all the answers

    What is the geographic distribution of chromoblastomycosis?

    <p>It occurs mainly in the tropics</p> Signup and view all the answers

    What is the characteristic of Tinea Capitis caused by Trichophyton tonsurans?

    <p>Produces spores within the hair shaft</p> Signup and view all the answers

    What is the primary goal of treatment for Tinea Capitis?

    <p>To remove infected and dead epithelial structures and apply a topical antifungal drug</p> Signup and view all the answers

    What is the recommended treatment for Tinea Corporis, Tinea Pedis, and related infections?

    <p>Itraconazole and terbinafine, or topical preparations such as miconazole nitrate, tolnaftate, and clotrimazole</p> Signup and view all the answers

    What is the characteristic of Tinea Unguium?

    <p>It is the most difficult to treat, often requiring months of oral itraconazole or terbinafine</p> Signup and view all the answers

    What is the recommended duration of treatment for Tinea Corporis, Tinea Pedis, and related infections?

    <p>For 1-2 weeks after clearing of the lesions</p> Signup and view all the answers

    What is the characteristic of Anthropophilic species in terms of infections?

    <p>Relatively mild and chronic infections</p> Signup and view all the answers

    Which species is globally distributed and causes human infections?

    <p>Epidermophyton floccosum</p> Signup and view all the answers

    What is the typical site of infection for Tinea Pedis?

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

    What is the characteristic of Tinea Unguium?

    <p>Affects the nails</p> Signup and view all the answers

    Which type of dermatophytosis affects the groin area?

    <p>Tinea Cruris</p> Signup and view all the answers

    What is the typical site of infection for Tinea Corporis?

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

    What is the characteristic of Geophilic and Zoophilic dermatophytes?

    <p>Produce acute and inflammatory infections</p> Signup and view all the answers

    Which of the following species is most commonly associated with geophilic infections?

    <p>Microsporum gypseum</p> Signup and view all the answers

    What is the characteristic of Trichophyton species?

    <p>Infect hair, skin, or nails</p> Signup and view all the answers

    What is the typical site of infection for Tinea Manus?

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

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