Mycology Practice Exam

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• Which statement about pseudohyphae budding into blastospores is correct?
• Periodic Acid Schiff (PAS) stain is used to detect fungi; which statement is true?
• Terbinafine belongs to which antifungal drug class?
• Name a common environmental reservoir for Aspergillus species.
• Sporangia are structures that produce
• Which organism is the etiologic agent of Pneumocystis jirovecii pneumonia?
• Which feature distinguishes pseudohyphae from true hyphae?
• Histoplasma capsulatum is commonly found in which environmental setting?
• In laboratory safety, what is the recommended containment for handling mold cultures and clinical specimens?
• Sporangium is
• Coccidioides immitis causes which disease?
• Which statement describes the standard induction therapy for cryptococcal meningitis in HIV patients?
• The organism described as the most common cause of aspergillosis is which?
• Which statement best describes Lactophenol Cotton Blue stain as used in mycology?
• Subcutaneous mycoses are typically associated with fungi that inhabit which environment?
• Which statement best describes the role of radiographic signs in the aspergillosis scenario?
• In patients with diabetic ketoacidosis, which fungal group is most commonly associated with mucormycosis?
• What is the main reservoir for Histoplasma capsulatum in nature?
• Negative staining uses which reagent to visualize capsules in Cryptococcus neoformans?
• Which staining method is most reliable for visualizing encapsulated yeasts such as Cryptococcus in CSF?
• The germ tube test is not valid if examined after how long?
• What is the standard prophylaxis approach for high-risk HSCT recipients to prevent fungal infections?
• What tissue morphological feature identifies Sporothrix schenckii?
• Penicillium marneffei is classified under which genus?
• Which two endemic fungi have a high prevalence in the Americas and cause significant lung disease?
• What is the primary basis for differentiating yeast species in assimilation tests?
• The germ tube test is used to identify which organism?
• What term describes a loose network of hyphae?
• Which genus is described as the most frequently encountered fungus in the lab?
• Which organism is associated with tinea versicolor and was formerly known as Pityrosporum?
• When performing a tease mount, which stain is commonly applied to observe fungal structures?
• Which organism is associated with a mucocutaneous infection that can disseminate?
• Which term describes the portion of the mycelium that projects above the substrate and may bear spores or fruiting bodies?
• Which organism is the most important cause of Tinea capitis in school children?
• What is the hallmark histologic feature of Aspergillus species in tissue?
• Which drug combination constitutes cryptococcal meningitis induction therapy in HIV patients?
• Which observation should be avoided in morphology reporting to prevent false positives?
• What is the mechanism of action of echinocandins and their primary activity spectrum?
• For suspected cryptococcal meningitis, which induction regimen is recommended?
• Which medium is used for primary recovery of fungi?
• Which organism is associated with tinea versicolor?
• Amphotericin B belongs to which antifungal drug class?
• What is the halo sign on chest CT indicative of?
• In the LCB procedure, what should be done after transferring the sample to the slide?
• What is the clinical utility of cryptococcal antigen testing?
• Name two endemic mycoses of the Americas and their geographic distribution.
• Which of the following statements is true about the management of early-stage aspergillosis?
• Which term describes a thick-walled resting spore formed by rounding up of a cell?
• In the germ tube test, the germ tube is typically how long relative to the parent yeast cell?
• Which medium provides differential identification of Aspergillus species?
• Which of the following is an example of hyaline (non-pigmented) fungi?
• Which organism is associated with tinea versicolor?
• Which temperature range is optimal for yeast colony growth?
• Induction therapy for cryptococcal meningitis includes which agent?
• What morphological feature helps identify Sporothrix schenckii in tissue?
• What is the typical clinical presentation of tinea corporis (ringworm) on the body?
• Which pigment-producing fungi are known as 'dematiaceous' ?
• Which drug is part of the standard induction regimen for cryptococcal meningitis?
• Which structures are observed in the culture forms of Cutaneous Mycoses?
• Which organism is commonly responsible for onychomycosis?
• Caspofungin belongs to which antifungal drug class?
• Paracoccidioides brasiliensis causes which mycosis?
• Which of the following terms is most characteristic of mold colony morphology?
• Which stain highlights fungal cell wall polysaccharides in tissue sections and is often used with PAS?
• Cryptococcus neoformans causes which infection?
• Which fungi are commonly involved in allergic or chronic sinus disease in the immunocompetent?
• Subcutaneous mycoses are usually transmitted by which mechanism?
• In a yeast assimilation test, what indicates a positive result?
• Which organism shows germ tube formation at 37°C and is a leading cause of mucosal candidiasis?
• Which disease is caused by Sporothrix schenckii?
• What is a key advantage of using large culture tubes (150 x 25 mm) for fungal culture?
• In dimorphic pathogens, which statement correctly assigns forms to temperatures?
• What is the classic tissue morphology of Histoplasma capsulatum within macrophages?
• What is the typical induction therapy regimen for cryptococcal meningitis in HIV infection?
• Which selective medium is used to inhibit saprophytic molds by containing cycloheximide?
• Which statement is true about the organism most commonly associated with aspergillosis?
• Which description corresponds to coenocytic hyphae?
• Which environmental exposure is commonly associated with Aspergillus species?
• Which sterol is targeted by amphotericin B?
• Which statement best describes Scotch Tape Preparation?
• In dimorphic fungi, which phase is described as mold/mycelial with delicate hyphae less than 1-2 mm and cobweb-like appearance?
• Which statement describes molds?
• What is the typical imaging sign on CT for early invasive pulmonary aspergillosis?
• What is a primary use of Lactophenol Cotton Blue stain in fungal studies?
• Scotch Tape Preparation is used for diagnosis of which condition?
• Which dermatophyte is described as the most common species isolated and capable of causing infections such as capitis, pedis, corporis, and onychomycosis?
• Which additive in selective media inhibits most saprophytic fungi?
• Which receptor on immune cells recognizes fungal beta-glucans?
• In the context of aspergillosis, which statement is correct regarding the most common species?
• Opportunistic mycoses typically affect which patient group?
• Which technique is designed for microscopic examination of fungi in natural state and is used on dermatophytes?
• What microscopic appearance is characteristic for Malassezia furfur in skin scrapings?
• What organism causes oral and vaginal candidiasis most commonly?
• Which of the following is true about the induction therapy for cryptococcal meningitis?
• Which statement about fungi best describes them?
• Which step is part of the Lactophenol Cotton Blue staining procedure?
• Which organism is commonly responsible for onychomycosis?
• Dematiaceous fungi are typically pigmented; which color description best fits them?
• Which organism is NOT among the systemic (deep) mycoses listed?
• Blastoconidia are spores formed by budding
• Which habitat types describe the range of hosts for cutaneous dermatophytes?
• After induction therapy for cryptococcal meningitis with liposomal amphotericin B and flucytosine, what is the next step in therapy?
• Epidermophyton floccosum is classically associated with which infections?
• What are the basic structural units of mold?
• Which species is identified as the most common cause of aspergillosis?
• Which antifungal agent is commonly used as first-line therapy for aspergillosis in this scenario?
• Which practice is recommended for large culture tubes when preparing fungal cultures?
• Which order of fungi is responsible for mucormycosis and what is a key histologic feature?
• Which species causes Tinea capitis, Tinea pedis, Tinea corporis, and onychomycosis?
• Nails may require how long for adequate clearing during preparation?
• What equipment is used in the tease mount technique?
• Which organism is the leading cause of mucosal candidiasis?
• Which medium inhibits bacteria and saprophytic fungi using cycloheximide, chloramphenicol, and dextrose and is used for dermatophytes?
• Which dermatophyte genus is most commonly implicated in tinea pedis and onychomycosis?
• What is the most common presentation of cryptococcal meningitis in HIV patients?
• Mycology is the branch of science that studies what?
• Which of the following best describes the overall management approach for early-stage aspergillosis with a CT halo sign and negative cultures?
• Clearing of keratin-containing material can be accelerated by which step?
• What is the primary mechanism by which azoles inhibit fungal growth?
• Which of the following is a dematiaceous fungus?
• In systemic mycoses, each causative species has a preferred organ to invade.
• Which dermatophyte is recovered from hair and skin and commonly causes tinea corporis and capitis?
• Which species is the 2nd most common and causes T. pedis, T. corporis, T. cruris, and onychomycosis?
• Which medium is selective for dermatophytes?
• Blastomyces dermatitidis causes which mycosis?
• What is the classic tissue finding for Sporothrix schenckii infection?
• How do yeast reproduce?
• Which magnifications are used in the tease mount examination?
• In suspected aspergillosis with negative cultures, which diagnostic step is used to confirm the diagnosis?
• Which part of the mycelium extends above the substrate and may bear spores?
• For maintenance after screening, to what should you subculture?
• What imaging sign on CT is associated with recovery from invasive aspergillosis?
• Which statement about fungal reproduction is correct?
• Which organism is the leading cause of opportunistic fungal infections in ICU patients?
• Petri dishes for fungal culture provide which advantage?
• The organism Penicillium marneffei is described as having which disease progression?
• Which structure is elongated buds that have failed to separate and are connected together to form a link-of-sausage appearance?
• Which stain is used to visualize fungal capsules in Cryptococcus using a pink capsule?
• In clinical mycology, MALDI-TOF mass spectrometry is primarily used for which purpose?
• Which genus name is currently used for the organism formerly known as Pityrosporum?
• What is the recommended management approach for early-stage aspergillosis with a CT halo sign and negative cultures?
• Which morphological feature characterizes Candida species in lactophenol cotton blue preparations?
• Which dermatophyte is the second most common cause of infections including pedis, corporis, cruris, and onychomycosis?
• What indicates a positive result in yeast fermentation test?
• Which fungal group is characterized by broad, non-septate hyphae with right-angle branching in tissue?
• Which medium isolates saprobic and pathogenic fungi from mixed flora specimen (i.e., sputum)?
• What is the major toxicity concern with conventional amphotericin B?
• Which organism is described as causing mucocutaneous infection that may disseminate?
• Which organism is associated with lymphocutaneous sporotrichosis having nodular lesions along lymphatic channels?
• Which feature is used to identify Zygomycetes in clinical microbiology?
• In slide culture technique, where do portions of the mycelium adhere after incubation?
• Which fungus is most commonly linked to aflatoxin contamination in food supplies?
• Which method uses 10-40% KOH to demonstrate fungal hyphae and spores in clinical material?
• Which organism is encapsulated and best visualized as a capsule halo with India ink in CSF?
• A known limitation of the beta-D-glucan assay in screening for fungal infections is that it may yield what?
• What statement differentiates septate from aseptate hyphae?
• Which formulation reduces nephrotoxicity compared to conventional amphotericin B?
• Eukaryotic describes cells that are
• Which term refers to the nutrient-absorbing portion of the mycelium?
• What is the classic tissue morphology of Coccidioides species in tissue?
• Which fungus listed is non-thermally dimorphic?
• Which mycotoxin is produced by Aspergillus species and poses a public health risk?
• Which of the following is NOT among the three commonly encountered Zygomycetes?
• Which medium is selective for dermatophytes and commonly used for screening purposes?
• In direct microscopic examination, spore and hyphae stain how on Gram stain?
• Which class of fungi is typically non-pigmented (hyaline) under the microscope?
• What is the gold standard confirmatory test for onychomycosis?
• Histoplasma capsulatum is associated with which nickname for a disease?
• What is the classic host immune response that protects against disseminated fungal infections?
• What medium is used in the slide culture technique?
• Which medium is commonly used for primary recovery of dermatophytes?
• Which antifungal drug class inhibits 14-alpha-demethylase, decreasing ergosterol synthesis?
• Which medium supports morphological studies of Candida and produces chlamydospores in nutritionally deficient conditions?
• Which cytokine is most closely associated with the Th1-mediated defense against disseminated fungal infections?
• Which step is described as part of the LCB procedure?
• Which term describes hyphae that lack crosswalls?
• The infection sequence associated with Penicillium marneffei is which of the following?
• Which laboratory test is most commonly used to diagnose dermatophyte skin infections by demonstrating hyphae?
• Which organism is commonly associated with chromoblastomycosis and phaeohyphomycosis?
• Which radiologic sign around a nodular lesion on CT indicates early invasive pulmonary aspergillosis?
• ABPA stands for which clinical syndrome?
• What is the diagnostic approach to confirm suspected aspergillosis when initial cultures are negative?
• Which statement about Aspergillus is true in this context?
• Which genus is commonly implicated in mucormycosis among diabetic patients?
• Echinocandins are not active against which organisms?
• Which organism is described as appearing black on Gram-stain preparations?
• In induction therapy for cryptococcal meningitis in HIV patients, which regimen is commonly recommended?
• What is the classic tissue morphology of Blastomyces dermatitidis?
• The disease caused by Aspergillus is known as which?
• Which pairing is correct for antifungal class and example?
• In clinical microbiology, which genus is described as the most frequently encountered fungus in the laboratory?
• Hyaline fungi are typically described as what color under the microscope?
• Which feature is characteristic of dermatophytes when viewed in lactophenol cotton blue mounts?
• Which two endemic fungi have a high prevalence in the Americas and cause significant lung disease?
• Which organism commonly causes tinea corporis and tinea capitis?
• Which stain is routinely used to visualize fungi in tissue and shows fungal elements with black deposition?
• Which organism is responsible for cutaneous candidiasis and thrush in immunocompromised individuals?
• Which fungi are commonly involved in allergic sinus disease in the immunocompetent?
• Blastoconidia/Blastospores are spores formed by
• What is a common imaging feature of aspergillosis on CT during recovery?
• Histoplasma capsulatum is endemic in which region of the United States?
• After staining with Lactophenol Cotton Blue, fungal structures typically appear as which color?
• Chlamydoconidia are spores formed by
• What antigen test is used for invasive aspergillosis and detects a component of the Aspergillus cell wall?
• Which statement is true about true hyphae?
• Which diagnostic tool detects infected hairs by fluorescing yellow-green under ultraviolet illumination?
• Penicillium marneffei is classified under which genus?
• Chlamydoconidia/Chlamydospore are spores formed by
• Which medium is used for the recovery of saprobic and pathogenic fungi?
• What organism is most commonly responsible for tinea versicolor?
• Which specimen types can be used for cryptococcal antigen testing?
• In a germ tube test, which description best matches the germ tube?
• Systemic (deep) mycoses are typically acquired by inhalation of spores from what source?
• Which assay broadly screens for fungal infections but may yield false positives and negatives?
• Which organism is associated with the spaghetti-and-meatballs appearance in skin scrapings?
• Induction therapy for cryptococcal meningitis in HIV patients (first-line drug combination)?
• Calcofluor White staining is observed under which microscope?
• What is the standard first-line therapy for mild-to-moderate Pneumocystis jirovecii pneumonia if no sulfa allergy?
• Septate hyphae are hyphae that are subdivided into individual cells by
• Which clinical syndrome is associated with an allergic-type reaction to Aspergillus in the lungs?
• Which cryptococcal meningitis emphasis is correct in HIV patients?
• Which pigment characterizes dematiaceous fungi?
• Saprophytic describes an organism that derives nourishment from
• Which virulence factor of Cryptococcus facilitates its spread in the host?
• What is the optimum incubation temperature range for mold colonies?
• Which amphotericin B formulation is used in the standard induction therapy for cryptococcal meningitis?
• Malassezia furfur is associated with which condition?
• Coccidioides spp. are endemic to which region?
• Which statement is true about pseudohyphae?
• Which microscopic feature is associated with Tinea versicolor in lactophenol cotton blue mounts?
• Which transmission mechanism is described for tinea capitis infection that may show hair fluorescence under Wood lamp?
• Fungi are
• The most common species causing aspergillosis is which of the following?
• The clinical forms such as capitis, pedis, and corporis are designated by what naming convention?
• Septate hyphae are hyphae that are subdivided into individual cells by
• The infection Sporothrix schenckii typically causes which clinical form when lymphatics are involved?
• Mycosis is