Myco Flashcards
The major features by which molds are routinely categorized are:
Macroscopic growth characteristics and microscopic morphology
A sputum specimen found from a patient with a known klebsiella pneumonia
Include media that have cyclohexamide
Many fungal infections are transmitted a man via inhalation
Histoplasma capsulatum
Using a fluorescent microscope
Calcofluor white
Formation of germ tubes
Candida albicans
An HIV -positive patient begins to show of meningitis
Cryptococcus neoformans
Caffeic acid media inoculated
Cryptococcus neoformans
The one characteristic by which an unknown cryptococcus species can be identified as cryptococcus neoformans is:
Positive phenol oxidase test
A urine culture from a patient with a urinary tract infection “failure to produce germ tubes”
Candida glabrata
The recovery of some molds and yeast
Cycloheximide
A neonatal blood culture collected through a catheter grows a small yeast.
Malassezia furfur
Which medium could a technologist use to verify that a yeast isolate from a blood culture is pure?
Chrome agar ( chromagenic agar)
The morphological characteristic of a yeast grown in rabbit plasma are shown the in the image.
Candida albicans
The most sensitive test for the initial diagnosis of cryptococcal disease is:
Cryptococcal antigen
Which of the ff. Procedures is recommended to confirm that an unknown mold is one of the pathogenic dimorphic fungi?
Molecular testing
Laboratory workers should always work under a biological safety hood when working with cultures of:
Coccidoides immitis
Structures important in the microscopic identification of coccidoides immitis are:
Irregular staining, barrel-shaped arthrospores
Which of the following is the most useful morphological feature in identifying the mycelia phase of histoplasma capsulatum?
8 - 14 um tuberculate macroconidia
A mold growing at 25C exhibits delicate, septate, hyaline hyphae and many more conidiophores extending at right angles
Sporothrix schenckii
Which of the following is a dimorphic fungus?
Blastomyces dermatitis
Examination of a fungal culture from a bronchial washing reveals white, cottony aerial mycelium
MALDI-TOF mass spectrometry
The mold shown in the image is isolated from a bone marrow culture of a patient who travelled to southeast Asia
Talaromyces marneffei (formerly penicillium)
The microscopic structures that are most useful in the identification of dermatophytes are:
Macroconidia and microconidia
The correct identification of dermatophyte seen in this image ISI
Epidermophyton floccosum
Culture of a strand of hair
Microsporum andouinii
On day 3 of fungal culture “cotton candy”
Zygomycete
Talaromyces (formerly penicillium ) species be can separated from aspergillus fumatigus by:
Lack of vesicle
A fungus superficially resembles talaromyces (formerly penicillium) species but may be differentiated because its phialides are long and tapering and bend away
Paecilomyces
An isolate from a cornea infection had the gram stain shown in the image
Fusarium
In the USA, a most common cause of eumycotic mycetoma is:
Psendallascheria boydii
Crust from a cauliflower -like lesion the on hand
Fonsecaea pedrosoi
Which of the following scenarios presents the greatest risk for coccidiodomycosis?
Central Valley California migrant worker
Which of the ff. Is the most helpful in distinguishing the morphology of yeast?
Cornmeal agar with Tween 80
The most likely identification of the mold shown in the images is (may dalamang plate sa pic )
Aspergillus fumatigus
“Birds on a wire”
Trichophyton rubrum
Which fungal organism is crease (+) and phenol oxidase (+)?
Cryptococcus neoformans
A mold grows on SAB agar in 2 days, with “salt and pepper” colonies
Rhizopus
A dematiceous mold grew in 4 days on sabouraud agar, isolated from a foot wound.
Alternaria
This fungus is encapsulated and produces by budding.
Cryptococcus gattii
