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Mycology Pract 4&5

A practice test for Microbiology/Mycology quizes 4 and 5

QuestionAnswer
Hortaea werneckii causes what disease? Tinea nigra
Malassezia furfur causes what disease? Pityriasis versicolor
Piedraia hortai causes what disease? Black piedra
Trichsporon beigelli causes what disease? White piedra
Which species has black, glaborous colonies that turn olive green/grey? Horaea werneckii
Which species has round, yellow colonies? Malassezia furfur
Which species has colonies that are dark brown to black? Piedraia hortai
Which species has cream colored, wrinkled colonies? Trichosporon beigelii
Candida albicans makes what on BAP? pseudohyphae
Candida albicans is germ tube positive or negative? positive
Which species makes brown colonies on bird see agar? Cryptococcus neoformans
Which species normally makes creamy, buttery colonies or wet mucoid colonies? Cryptococcus neoformans
Which species has many macroconidia that are septate and spindle shaped? Microsporum sp.
Which species has pencil shaped macroconidia? Trichophyton sp
Which species has 2-4 celled macroconidia that are club shaped and no microcondia? Epdermophyton sp.
Which genus floresces under a Wood's lamp? Malassezia furfur (Microsporum sp.fluoresces when a dye is added?)
Which species can be seen when overlaying the agar with olive oil? Malassezia furfur
What steps do we follow to ID species of yeast? 1. Check morphology 2. Use wet mount of gram stain 3. Use India ink (if CSF sample for meningitis) 4. germ tube test 5. biochem test
Which species is germ tube POS and makes pseudohyphae on BAP? Candida albicans
Why does Malassezia furfur fluoresce yellow-green? It makes pityrialactone
Created by: IsaacJ
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