Microbiology Exam Trivia: MCQ! Quiz

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  • 1/54 Questions

    Itching, pain, inflammation, loss of hearing, and serous secretions of a chronic infection of the external ear are characterized by?

    • Otomycosis
    • Tinea Faciei
    • Tinea Barbae
    • Tinea Favosa
    • Histoplasmosis
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About This Quiz

The 'Microbiology Exam Trivia: MCQ! Quiz' tests your knowledge on fungal infections, focusing on causes, treatments, and characteristics of various mycoses. It is ideal for learners in medical fields, enhancing understanding of mycology and dermatological infections.

Microbiology Exam Trivia: MCQ! Quiz - Quiz

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  • 2. 

    I am an African American woman and I present with pinkish-white patches on the skin of my upper body. What do I have?

    • Pityriasis (Tinea) Versicolor

    • Tinea Favosa

    • Otomycosis

    • Tinea Barbae

    • Tinea Capitis Ectothrix

    Correct Answer
    A. Pityriasis (Tinea) Versicolor
    Explanation
    Pityriasis (Tinea) Versicolor is a fungal infection that causes pinkish-white patches on the skin. It is more common in individuals with darker skin tones, such as African Americans. The infection is caused by a type of yeast called Malassezia, which is naturally present on the skin but can overgrow and cause discoloration. The patches are usually more noticeable in areas with higher concentrations of oil glands, such as the upper body. Treatment typically involves antifungal medications, such as topical creams or oral medications, to eliminate the yeast and restore the normal skin color.

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  • 3. 

    Organisms that are normally and consistently found in or on the body in the absence of disease.

    • Normal Flora

    • Symbiosis

    • Commensalism

    • Mutualism

    • Parasitism

    Correct Answer
    A. Normal Flora
    Explanation
    Normal flora refers to the microorganisms that naturally and consistently inhabit the body without causing any harm or disease. These organisms can be found on the skin, in the respiratory tract, digestive tract, and other areas. They have a symbiotic relationship with the body, as they benefit from the environment provided by the body while also providing certain benefits to the host, such as aiding in digestion or preventing the growth of harmful bacteria.

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  • 4. 

    A patient comes into the doctor's office and their external auditory meatus contains large masses of epithelial debris containing fungi and/or bacteria and fungi. What does the patient have?

    • Otomycosis

    • Tinea Favosa

    • Pityrasis (tinea) versicolor

    • Tina Capitis Ectothrix

    • Tinea Capitis Endothrix

    Correct Answer
    A. Otomycosis
    Explanation
    The patient has otomycosis, which is a fungal infection of the external auditory meatus. This infection is characterized by the presence of large masses of epithelial debris containing fungi and/or bacteria and fungi.

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  • 5. 

    Which is an opportunistic mold, saprophytic, monomorphic mold that causes superficial infections of the outer ear?

    • Tinea Faciei

    • Otomycosis

    • Pityriasis (Tinea) Versicolor

    • Tinea Capitis Ectothrix

    • Tinea Barbae

    Correct Answer
    A. Otomycosis
    Explanation
    Otomycosis is a superficial infection of the outer ear caused by an opportunistic mold. It is classified as a saprophytic mold, meaning that it obtains nutrients from dead organic matter. Otomycosis is also monomorphic, which means that it exists in only one form or shape. This condition specifically affects the outer ear and can cause symptoms such as itching, pain, and discharge.

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  • 6. 

    KOH/PAS staining of skin scrapings show short, stubby hyphae and globose budding yeast cells (spaghetti and meatballs)

    • Tinea Favosa

    • Tinea Faciei

    • Otomycosis

    • Pityriasis (Tinea) Versicolor

    • Tinea Barbae

    Correct Answer
    A. Pityriasis (Tinea) Versicolor
    Explanation
    The given answer is Pityriasis (Tinea) Versicolor because the description of "short, stubby hyphae and globose budding yeast cells" is characteristic of this fungal infection. Pityriasis versicolor is caused by the yeast Malassezia furfur and typically presents with hypo- or hyperpigmented scaly patches on the skin. The "spaghetti and meatballs" appearance refers to the combination of short hyphae and yeast cells seen on microscopic examination, resembling pasta and meatballs. This finding is consistent with the KOH/PAS staining of skin scrapings in Pityriasis (Tinea) Versicolor.

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  • 7. 

    Which is not true of the transmission of the Tinea Capitis Ectothrix?

    • Can be transmitted from person to person

    • Can be transmitted by contaminated fomites

    • Can be transmitted by non-human mammals

    • Can be transmitted by aerial dissemination

    • Can be transmitted by kissing

    Correct Answer
    A. Can be transmitted by kissing
    Explanation
    Tinea Capitis Ectothrix is a fungal infection of the scalp caused by certain species of fungi. It is primarily transmitted from person to person through direct contact with an infected individual or through contaminated fomites such as combs, hats, or pillows. It can also be transmitted by non-human mammals, such as cats and dogs, which can carry the fungi on their fur. Additionally, it can be transmitted through aerial dissemination, where the fungal spores become airborne and are inhaled by others. However, it is not transmitted through kissing, as the fungi do not typically reside in the oral cavity.

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  • 8. 

    I am a pale white person and I present with red, brownish, blotchy, scaly, painless, hypopigmented, or hyperpigmented patches on the skin of my upper body? What do I have?

    • Tinea Capitis Endothrix

    • Tinea Favosa

    • Tinea Faciei

    • Pityriasis (tinea) versicolor

    • Otomycosis

    Correct Answer
    A. Pityriasis (tinea) versicolor
    Explanation
    The correct answer is Pityriasis (tinea) versicolor. Pityriasis versicolor is a fungal infection that causes patches of discolored skin. It is caused by an overgrowth of yeast on the skin and commonly affects the upper body. The patches can be red, brownish, blotchy, scaly, hypopigmented, or hyperpigmented. The condition is usually painless and may be more noticeable in pale individuals.

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  • 9. 

    An obligatory relationship in which one organism, the parasite, is metabolically dependent on another organism, the host. The host is usually harmed.

    • Normal flora

    • Symbiosis

    • Commensalism

    • Mutualism

    • Parasitism

    Correct Answer
    A. Parasitism
    Explanation
    Parasitism is an obligatory relationship between two organisms where one organism, the parasite, depends on the other organism, the host, for its metabolic needs. In this relationship, the host is usually harmed. This is different from other types of relationships such as mutualism, where both organisms benefit, commensalism, where one organism benefits and the other is unaffected, and normal flora, which refers to the microorganisms that live in or on the body without causing harm.

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  • 10. 

    What is caused by Malassezia furfur?

    • Tinea Faciei

    • Otomycosis

    • Pityriasis (Tinea) Versicolor

    • Tinea Capitis Ectothrix

    • Tinea Barbae

    Correct Answer
    A. Pityriasis (Tinea) Versicolor
    Explanation
    Malassezia furfur is a type of yeast that is responsible for causing Pityriasis (Tinea) Versicolor. This condition is a common fungal infection of the skin that results in the development of discolored patches on the skin. The yeast overgrowth disrupts the normal pigmentation of the skin, leading to the appearance of lighter or darker patches. Pityriasis (Tinea) Versicolor is typically not harmful or contagious, but it can cause cosmetic concerns and may recur in some individuals. Treatment usually involves the use of antifungal medications to control the yeast overgrowth and restore the normal color of the skin.

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  • 11. 

    This is a monomorphic mold that causes cutaneous mycoses of the glabrous skin of the face. Doesn't involve the hair on the face.

    • Tinea Faciei

    • Otomycosis

    • Tinea Corporis

    • Tinea Barbae

    • Tinea Capitis Ecothothrix

    Correct Answer
    A. Tinea Faciei
    Explanation
    Tinea faciei is a fungal infection that affects the glabrous skin of the face. Glabrous skin refers to the smooth, hairless skin on the face. This infection does not involve the hair on the face, which differentiates it from tinea barbae, which affects the hair follicles of the beard area. Otomycosis is a fungal infection of the ear canal, tinea corporis is a fungal infection of the body, and tinea capitis ectothrix is a fungal infection of the scalp. Therefore, the correct answer is tinea faciei.

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  • 12. 

    Leukonychia mycotica is a_____

    • Nail invasion that begins as exfolative in the nail plate and become vesicular red circumscribed patches on the surface of the nail

    • Nail invasion resticted to white patches or pits on the surface of the nail

    Correct Answer
    A. Nail invasion resticted to white patches or pits on the surface of the nail
    Explanation
    Leukonychia mycotica refers to a nail invasion that is limited to white patches or pits on the surface of the nail. It does not involve exfoliative changes or vesicular red circumscribed patches.

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  • 13. 

    Which is not a predisposing factor for Pityriasis (Tinea) Versicolor?

    • Use of lipid emulsions and illness

    • Malnutrition and low electrolytes

    • High Temperature and humity

    • High cortisol levels

    Correct Answer
    A. Malnutrition and low electrolytes
    Explanation
    All are correct except for low electrolytes

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  • 14. 

    Infection of Pityriasis (Tinea) Versicolor is most common between?

    • Adolescence and Elderly

    • Adolescence and Middle Age

    • Middle Age and Elderly

    • Neonates and Adolescence

    • Middle Age and Neonates

    Correct Answer
    A. Adolescence and Middle Age
    Explanation
    Pityriasis (Tinea) Versicolor is a fungal infection that affects the skin. It is caused by an overgrowth of yeast on the skin's surface. The condition is most commonly seen in adolescents and middle-aged individuals. During adolescence, hormonal changes and increased oil production can create an environment favorable for the growth of the yeast. In middle age, factors such as increased sweating, weakened immune system, and changes in the skin's pH levels can contribute to the development of the infection. Therefore, the infection of Pityriasis (Tinea) Versicolor is most common between adolescence and middle age.

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  • 15. 

    Which of the following infects humans and animals but humans and animals are not reservoirs?

    • Humans and animals are always reserviors

    • Otomycosis

    • Tinea Barbae

    • Tinea Faciei

    • Tina Capitis Ectothrix

    Correct Answer
    A. Otomycosis
    Explanation
    Otomycosis is a fungal infection that affects the ear canal. It is caused by various types of fungi, such as Aspergillus and Candida. While otomycosis can infect both humans and animals, neither humans nor animals serve as reservoirs for the infection. This means that the fungi do not typically colonize and multiply within the bodies of humans or animals, but rather are acquired from external sources. Therefore, otomycosis does not rely on humans or animals as a source for continued transmission.

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  • 16. 

    Type of symbiosis in which both host and parasite benefit.

    • Normal Flora

    • Symbiosis

    • Commensalism

    • Mutualism

    • Parasitism

    Correct Answer
    A. Mutualism
    Explanation
    Mutualism is a type of symbiotic relationship where both the host and the parasite benefit. In this type of interaction, both organisms rely on each other for survival and gain some advantage from the relationship. This can involve exchanging nutrients, protection, or other resources. In mutualism, both parties have a mutually beneficial arrangement, which distinguishes it from other types of symbiosis such as commensalism or parasitism.

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  • 17. 

    In this infection conidia and hyphae are seen inside hair shafts on the KOH/PAS stains.

    • Tinea Corporis

    • Tinea Faciei

    • Tinea Barbae

    • Tinea Capitis Ectothrix

    • Tinea Capitis Endothrix

    Correct Answer
    A. Tinea Capitis Endothrix
    Explanation
    Tinea Capitis Endothrix is the correct answer because it is a fungal infection of the scalp caused by dermatophytes that invade the hair shaft internally. On KOH/PAS stains, conidia (asexual spores) and hyphae (filamentous structures) can be seen inside the hair shafts, confirming the diagnosis of Tinea Capitis Endothrix.

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  • 18. 

    This is a dimorphic fungus found in arid and semiarid regions in SW United States, Central America, and S. America in the soil.

    • Coccidioidomycosis

    • Histoplasmosis

    • Mucormycosis

    • Onychomycosis

    • Aspergillosis

    Correct Answer
    A. Coccidioidomycosis
    Explanation
    Coccidioidomycosis is caused by a dimorphic fungus and is commonly found in arid and semiarid regions in the mentioned areas. It primarily affects the lungs and can cause flu-like symptoms such as fever, cough, and fatigue. The fungus is typically found in the soil and can be inhaled by humans, leading to infection. This explanation aligns with the given information about the fungus being dimorphic, found in specific regions, and present in the soil.

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  • 19. 

    The close association or living together of organisms of different species.

    • Normal flora

    • Symbiosis

    • Commensalism

    • Mutualism

    • Parasitism

    Correct Answer
    A. Symbiosis
    Explanation
    Symbiosis refers to the close association or living together of organisms of different species. It is a relationship where both organisms benefit from each other. This can include mutualism, where both organisms benefit, or commensalism, where one organism benefits while the other is unaffected. Symbiosis can also involve parasitism, where one organism benefits at the expense of the other. In this context, symbiosis is the best fit as it encompasses all types of relationships where different species live together.

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  • 20. 

    A type of symbiosis where a parasite is benefited and the host is neither benefited nor harmed by the relationship.

    • Normal flora

    • Symbiosis

    • Commensalism

    • Mutualism

    • Parasitism

    Correct Answer
    A. Commensalism
    Explanation
    Commensalism is a type of symbiotic relationship where one organism benefits (the parasite) while the other is neither benefited nor harmed (the host). In this case, the parasite benefits from the relationship, but the host is not affected positively or negatively. This is different from mutualism, where both organisms benefit, and parasitism, where the host is harmed. Normal flora refers to the microorganisms that naturally inhabit the body without causing harm, and symbiosis is a general term for any close and long-term interaction between two different species.

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  • 21. 

    Which of the following require re-treatment for chronic, relapsing lesions?

    • Pityriasis (Tinea) Versicolor

    • Tinea Faciei

    • Tinea Barbae

    • Tinea Capitis Ectothrix

    • Otomycosis

    Correct Answer
    A. Pityriasis (Tinea) Versicolor
    Explanation
    Pityriasis (Tinea) Versicolor requires re-treatment for chronic, relapsing lesions because it is a fungal infection caused by the yeast Malassezia, which is a normal part of the skin flora. The yeast can overgrow and cause discolored patches on the skin, especially in hot and humid conditions. Although treatment with antifungal medications can initially clear the infection, the yeast can persist in the skin and cause recurrent episodes. Therefore, re-treatment is often necessary to control the symptoms and prevent relapses.

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  • 22. 

    Otomycosis is NOT part of which species?

    • Aspergillus

    • Trichophyton

    • Penicillin

    • Mucor

    • Rhizopus

    Correct Answer
    A. Trichophyton
    Explanation
    Trichophyton is a genus of fungi that commonly cause infections in the skin, hair, and nails. Otomycosis, on the other hand, refers to a fungal infection of the ear canal. While Aspergillus, Penicillin, Mucor, and Rhizopus are all known to cause otomycosis, Trichophyton is not typically associated with this condition. Therefore, Trichophyton is the correct answer as it is not part of the species that cause otomycosis.

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  • 23. 

    This is also known as gray-patch ringworm that is a prepubertal infection of the scalp, eyelashes and eyebrows.

    • Tinea Capitis Ectothrix

    • Tinea Capitis Endothrix

    • Tinea Faciei

    • Tinea Corporis

    • Tinea Favosa

    Correct Answer
    A. Tinea Capitis Ectothrix
    Explanation
    Tinea Capitis Ectothrix is the correct answer because it refers to a type of fungal infection that affects the scalp, eyelashes, and eyebrows. It is commonly seen in children before puberty. The term "ectothrix" indicates that the fungal infection occurs on the outside of the hair shaft, which is a characteristic feature of this type of tinea capitis. The other options listed are different types of fungal infections that affect various parts of the body, but they do not specifically match the description given in the question.

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  • 24. 

    Which of the following is true concerning Tinea Capitis Ectothrix?

    • Male infection and female infection common before puberty

    • Male infection and female infection common after puberty

    • Male infection common before puberty and female infections common after puberty

    • Male infection common after puberty and female infections common before puberty

    Correct Answer
    A. Male infection common before puberty and female infections common after puberty
    Explanation
    Tinea Capitis Ectothrix is a fungal infection of the scalp. It is more common in children, especially before puberty, which explains why male infection is common before puberty. However, after puberty, female hormones and increased oil production in the scalp make females more susceptible to this infection, which is why female infections are common after puberty.

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  • 25. 

    Which of the following if found in Africa and Europe?

    • Tinea Barbae

    • Pityriasis (Tinea) Versicolor

    • Tinea Favosa

    • Tinea Faciei

    • Tinea Manuum

    Correct Answer
    A. Tinea Favosa
    Explanation
    Tinea Favosa is a fungal infection that can be found in both Africa and Europe. It is characterized by the formation of thick, yellow crusts on the scalp, which can lead to hair loss. The infection is caused by a fungus called Trichophyton schoenleinii. It is more common in areas with poor hygiene and overcrowding. Treatment typically involves antifungal medications and good hygiene practices.

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  • 26. 

    Chains of macroconidia and hyphae are seen on hair shafts treated with KOH/PAS stains.

    • Tinea Barbae

    • Tinea Corporis

    • Tinea Capitis Ectothrix

    • Tinea Capitis Endothrix

    • Tinea Faciei

    Correct Answer
    A. Tinea Capitis Ectothrix
    Explanation
    The presence of chains of macroconidia and hyphae on hair shafts treated with KOH/PAS stains indicates Tinea Capitis Ectothrix. This is a type of fungal infection that affects the scalp and hair shafts, characterized by the presence of fungal spores and hyphae on the outer surface of the hair shaft. This differs from Tinea Capitis Endothrix, where the fungal spores and hyphae are found inside the hair shaft.

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  • 27. 

    A dimorphic mold that produces subcutaneous infection.

    • Psedallescheriasis

    • Sporotrichosis

    • Rhodotorulosis

    • Cryptococcosis

    • Pneumocystosis

    Correct Answer
    A. Sporotrichosis
    Explanation
    Sporotrichosis is a fungal infection caused by the dimorphic mold Sporothrix schenckii. It primarily affects the skin, subcutaneous tissue, and lymphatic system. The mold is found in soil, plants, and decaying organic matter. Infection occurs through direct contact with contaminated material, such as thorns or splinters. Sporotrichosis usually presents as a painless, slowly progressive skin lesion that can ulcerate and spread along the lymphatic vessels. It is more common in gardeners, farmers, and individuals who handle plant material. Treatment typically involves antifungal medications, such as itraconazole or potassium iodide.

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  • 28. 

    Monomorphic molds that cause cutaneous mycoses of the scalp and belong to the Microsporum species.

    • Tinea Capitis Endothrix

    • Tinea Capitis Ectothrix

    • Tinea Faciei

    • Tinea Barbae

    • Tinea Corporis

    Correct Answer
    A. Tinea Capitis Ectothrix
    Explanation
    The correct answer is Tinea Capitis Ectothrix. Tinea Capitis is a fungal infection that affects the scalp, and it can be caused by different species of fungi, including Microsporum. Ectothrix refers to the location of the infection, where the fungal spores are found on the outside of the hair shaft. In this case, the question specifies that the molds belong to the Microsporum species, which is commonly associated with ectothrix infections.

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  • 29. 

    What are the incidence rates of Pityriasis (Tinea) Versicolor?

    • 45-65%

    • 40-60%

    • 20-40%

    • 40-50%

    • 50-70%

    Correct Answer
    A. 40-60%
    Explanation
    The incidence rates of Pityriasis (Tinea) Versicolor are estimated to be between 40-60%. This means that out of 100 people, 40-60 individuals are likely to be affected by this condition. Pityriasis Versicolor is a common fungal infection of the skin caused by an overgrowth of yeast. It typically presents as discolored patches on the skin, which can range in color from white to brown. The condition is more common in tropical and subtropical regions, and it is more prevalent in adolescents and young adults.

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  • 30. 

    Infection with this can develop into itchy papules and pustules (inflammation of hair follicles or the lacrimal sac) or atopic dermatitis on the back and upper trunk.

    • Pityriasis (Tinea) Versicolor

    • Tinea Barbae

    • Tinea Favosa

    • Otomycosis

    • Tinea Capitis Ectothrix

    Correct Answer
    A. Pityriasis (Tinea) Versicolor
    Explanation
    Pityriasis (Tinea) Versicolor is a fungal infection that can cause itchy papules and pustules on the skin, particularly on the back and upper trunk. It can also lead to inflammation of hair follicles or the lacrimal sac, as well as atopic dermatitis. This infection is caused by a type of yeast called Malassezia, which is naturally present on the skin but can overgrow and cause symptoms in certain conditions. Treatment usually involves antifungal medications applied to the affected areas.

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  • 31. 

    Which statement is false?

    • Tinea manuum KOH?PAS preps of skin scraping show masses of hyphae and macroconidia

    • Tinea manuum infection begins where there is maceration of the skin due to occupational activities

    • Tinea manuum is most prevalent in males and associated with Tinea Corporis

    • Tinea unguium is usually associated with Tinea pedis or Tinea manuum

    Correct Answer
    A. Tinea manuum is most prevalent in males and associated with Tinea Corporis
    Explanation
    The false statement is "Tinea manuum is most prevalent in males and associated with Tinea Corporis." Tinea manuum is a fungal infection of the hand, and it is not more prevalent in males. It can be associated with Tinea Corporis, which is a fungal infection of the body, but this association is not exclusive to males.

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  • 32. 

    Which of the following DOES NOT have an incubation period of 10 to 14 days (2wks)?

    • Tinea Faciei

    • Tinea Barbae

    • Tinea Corporis

    • Tinea Capitis Ectothrix

    • Tinea Unguium

    Correct Answer
    A. Tinea Unguium
    Explanation
    Tinea Unguium, also known as onychomycosis or nail fungus, does not have an incubation period of 10 to 14 days. It is a fungal infection that affects the nails, causing them to become thickened, discolored, and brittle. The incubation period for Tinea Unguium can vary, but it is typically longer than 14 days. The infection usually starts at the tip of the nail and gradually spreads to the rest of the nail. Treatment for Tinea Unguium often involves antifungal medications and may take several months to completely eliminate the infection.

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  • 33. 

    KOH preps of the exudate reveal fragments of mycelium with or without branches and septa?

    • Tinea Capitis Ectothrix

    • Tinea Barbae

    • Tinea Faciei

    • Otomycosis

    • Pityrasis (tinea) versicolor

    Correct Answer
    A. Otomycosis
    Explanation
    The presence of fragments of mycelium with or without branches and septa in KOH preps of the exudate suggests the diagnosis of Otomycosis. Otomycosis is a fungal infection of the ear canal, commonly caused by species of Candida or Aspergillus. The mycelium fragments seen in the KOH preps are characteristic of fungal infection, and the location of the infection in the ear canal aligns with the diagnosis of Otomycosis.

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  • 34. 

    What is the treatment for Pityriasis (tinea) Versicolor?

    • Fluconazole

    • Terbinafine

    • Griseofulvin

    • Miconazole

    • Ketoconazole

    Correct Answer
    A. Ketoconazole
    Explanation
    Ketoconazole is the correct treatment for Pityriasis (tinea) Versicolor. It is an antifungal medication that works by inhibiting the growth of the fungus causing the infection. Ketoconazole can be administered orally or applied topically as a cream or shampoo, depending on the severity of the condition. It is effective in treating Pityriasis Versicolor and helps to eliminate the infection and alleviate symptoms such as itching and skin discoloration.

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  • 35. 

    What is used to treat Otomycosis along with a wax hook to remove exudate?

    • Griseofulvin

    • Miconazole

    • Ketoconazole

    • Terbinafine

    • Floconazole

    Correct Answer
    A. Ketoconazole
    Explanation
    Ketoconazole is used to treat Otomycosis along with a wax hook to remove exudate. Otomycosis is a fungal infection of the ear, and ketoconazole is an antifungal medication that works by stopping the growth of the fungus. The use of a wax hook helps to remove any discharge or debris from the ear, allowing the medication to reach the affected area more effectively and improve the treatment outcome.

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  • 36. 

    What is the treatment for Tinea Capitis Ectothrix?

    • Fluconazole

    • Griseofluvin

    • Terbinafine

    • Ketoconazole

    • Miconazole

    Correct Answer
    A. Griseofluvin
    Explanation
    Griseofluvin is the correct treatment for Tinea Capitis Ectothrix. Tinea Capitis is a fungal infection of the scalp, and Griseofluvin is an antifungal medication commonly used to treat this condition. It works by inhibiting the growth of fungi, including the fungus causing Tinea Capitis. Other antifungal medications like Fluconazole, Terbinafine, Ketoconazole, and Miconazole may be used for different types of fungal infections, but Griseofluvin is specifically indicated for Tinea Capitis Ectothrix.

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  • 37. 

    PAS tissue stains show chlamydospores in asteroid bodies and cigar-shaped budding yeast forms in pus-filled granulomas.

    • Psedallescheriasis

    • Cryptococcosis

    • Sporotrichosis

    • Pneumocystosis

    • Rhodotorulosis

    Correct Answer
    A. Sporotrichosis
    Explanation
    The correct answer is Sporotrichosis because PAS tissue stains show chlamydospores in asteroid bodies and cigar-shaped budding yeast forms in pus-filled granulomas, which are characteristic features of Sporotrichosis.

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  • 38. 

    KOH/PAS stains of exudate reveal granules composed of broad, branching septate hyphae w/ dense, neutrophilic exudates as black grains.

    • Pseudallescheriasis

    • Sporotrichosis

    • Rhodotorulosis

    • Candidiasis

    • Cryptococcosis

    Correct Answer
    A. Pseudallescheriasis
    Explanation
    The given description of the staining pattern and the presence of broad, branching septate hyphae with dense, neutrophilic exudates as black grains is consistent with the diagnosis of pseudallescheriasis. Pseudallescheriasis is a fungal infection caused by the fungus Pseudallescheria boydii, which is known to produce these characteristic features on staining. Sporotrichosis, Rhodotorulosis, Candidiasis, and Cryptococcosis do not typically exhibit the same staining pattern or the presence of black grains.

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  • 39. 

    What is the incubation period for Pityriasis (Tinea) Versicolor?

    • Days

    • Two wks

    • Unknown

    • Months

    • Years

    Correct Answer
    A. Days
    Explanation
    The incubation period for Pityriasis (Tinea) Versicolor is usually a few days. This refers to the time between the initial exposure to the fungus and the appearance of symptoms. During this period, the fungus grows and multiplies on the skin, leading to the development of characteristic patches or spots. It is important to note that the exact length of the incubation period may vary from person to person.

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  • 40. 

    Most infections of this mold resolve rapidly and spontaneously.

    • Tinea Faciei

    • Tinea Capitis Endothrix

    • Tinea Capitis Ectothrix

    • Tinea Barbae

    • Tinea Corporis

    Correct Answer
    A. Tinea Capitis Ectothrix
    Explanation
    Tinea Capitis Ectothrix is the correct answer because it is a fungal infection of the scalp caused by certain types of fungi that grow on the outside of the hair shaft. This type of infection usually resolves quickly and spontaneously without the need for treatment.

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  • 41. 

    I am not transmitted from person to person or by animals?

    • Histoplasmosis

    • Coccidioidomycosis

    • Pityriasis (tinea) versicolor

    • Tinea Manuun

    • Tinea Faciei

    Correct Answer
    A. Coccidioidomycosis
    Explanation
    Coccidioidomycosis is a fungal infection caused by inhaling spores of the Coccidioides fungus. It is primarily found in arid regions and is commonly known as Valley fever. Unlike other options, such as Histoplasmosis and Tinea infections, Coccidioidomycosis is not transmitted from person to person or by animals. Instead, it is contracted by inhaling the fungal spores present in the soil.

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  • 42. 

    Which of the following is found worldwide in the soil?

    • Tinea Faciei

    • Otomycosis

    • Tinea Endothrix

    • Tinea Capitis Ectothrix

    • Pityriasis (Tinea) Versicolor

    Correct Answer
    A. Otomycosis
    Explanation
    Otomycosis is a fungal infection that affects the ear canal. It is caused by various fungi and can be found worldwide in the soil. This infection occurs when the fungi enter the ear canal and multiply, leading to symptoms such as itching, pain, and discharge. Treatment usually involves antifungal medications to eliminate the infection.

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  • 43. 

    Mycelial invasion results in local lesions in the lymphatics that contain neutrophils, macrophages, and giant cells.

    • Rhodotorulosis

    • Pseudallescheriasis

    • Candidiasis

    • Sporotrichosis

    • Pneumocytosis

    Correct Answer
    A. Sporotrichosis
    Explanation
    Mycelial invasion refers to the growth and spread of fungal mycelium, which is a network of branching filaments. In the case of sporotrichosis, a fungal infection caused by the Sporothrix schenckii fungus, mycelial invasion leads to the formation of local lesions in the lymphatics. These lesions contain various immune cells such as neutrophils, macrophages, and giant cells. This immune response is a characteristic feature of sporotrichosis and helps to identify it as the correct answer in this context.

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  • 44. 

    Non-infective, cutaneous allergic reactions can occur as a result of this infection.

    • Tinea Capitis Endothrix

    • Tinea Favosa

    • Tinea Capitis Ectothrix

    • Tinea Faciei

    • Tinea Barbae

    Correct Answer
    A. Tinea Capitis Endothrix
    Explanation
    Non-infective, cutaneous allergic reactions can occur as a result of Tinea Capitis Endothrix infection.

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  • 45. 

    A chronic infection that can persist through adult life.

    • Tinea Capitis Ectothrix

    • Tinea Capitis Endothrix

    • Tinea Barbae

    • Tinea Corporis

    • Tinea Favosa

    Correct Answer
    A. Tinea Capitis Endothrix
    Explanation
    Tinea Capitis Endothrix is the correct answer because it refers to a chronic infection that can persist throughout adult life. Tinea Capitis is a fungal infection that affects the scalp, and Endothrix specifically refers to the type of infection where the fungal hyphae invade the hair shaft internally. This type of infection can be difficult to treat and can lead to hair loss and scarring if left untreated.

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  • 46. 

    Hyphae invade subcutaneous tissue producing granulomas with allergic reactions.

    • Pneumocytosis

    • Pseudalescheriasis

    • Rhodotorulosis

    • Candidiasis

    • Sporotrichosis

    Correct Answer
    A. Pseudalescheriasis
    Explanation
    Pseudalescheriasis is a fungal infection caused by the fungus Pseudallescheria boydii. It is characterized by the invasion of hyphae (thread-like structures) into the subcutaneous tissue, leading to the formation of granulomas. These granulomas trigger allergic reactions in the body. Therefore, the given explanation aligns with the characteristics and symptoms of pseudalescheriasis.

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  • 47. 

    Lesions begin as coalesced papules in a ring form and can develop into kerion (body areas of massive inflammation or keloids (scars produced by collagen deposition).

    • Tinea Capitis Endothrix

    • Tinea Capitis Ectothrix

    • Tinea Faciei

    • Tinea Barbae

    • Tinea Corporis

    Correct Answer
    A. Tinea Capitis Ectothrix
    Explanation
    This answer is correct because tinea capitis ectothrix is a type of fungal infection that affects the scalp and hair shafts. It is characterized by lesions that start as coalesced papules in a ring form and can progress to form kerion or keloid scars.

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  • 48. 

    A monomorphic mold that produces subcutaneous infections.

    • Pneumocystosis

    • Sporotrichosis

    • Rhodotorulosis

    • Psedallescheriasis

    • Cryptococcosis

    Correct Answer
    A. Psedallescheriasis
    Explanation
    Pseudallescheriasis is a fungal infection caused by the fungus Pseudallescheria boydii. It commonly affects individuals with compromised immune systems and can cause subcutaneous infections. The other options, such as pneumocystosis, sporotrichosis, rhodotorulosis, and cryptococcosis, are caused by different pathogens and may not necessarily be monomorphic molds or specifically cause subcutaneous infections. Therefore, Pseudallescheriasis is the most suitable answer based on the given information.

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  • 49. 

    What is the treatment for Tinea Faciei?

    • Griseofluvin

    • Miconazole

    • Ketoconazole

    • Terbinafine

    • Fluconazole

    Correct Answer
    A. Miconazole
    Explanation
    Miconazole is the treatment for Tinea Faciei. Tinea Faciei is a fungal infection that affects the face and is commonly known as "ringworm of the face." Miconazole is an antifungal medication that works by stopping the growth of the fungus. It is available in various forms such as creams, powders, and sprays, which can be applied directly to the affected area. Miconazole is effective in treating Tinea Faciei and helps to relieve symptoms such as itching, redness, and inflammation.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 30, 2009
    Quiz Created by
    Jdabady

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