Fundamentals of mycology Flashcards
2015-2018
True of fungi
A. A septate mycelium is one in which no fruiting bodies are formed
B. Arthrospores and blastospores are formed by fungi in the telomorph stage
C. Chitin is a component of the fungal cell wall
D. Yeast produce mainly by conidia
C
Which of the following are true of fungi?
A. Septate fungi are seen in ascomycota, basidiomycota, and zygomycota
B. Mushrooms are found in ascomycota
C. Most fungi are saprophytes, feeding on dead or decaying organic matter
D. Fungi are prokaryotes consisting of intertwined filaments of cells
C
Statement A: Aflatoxins are produced by Aspergillus fumigatus
Statement B: Grains, peanuts, and other agricultural products can be infected by fungi that produces aflatoxins
A. Statement A is correct
B. Statement B is correct
C. Both statements are correct
D. Both statements are wrong
*
True of fungi
A. Fungi are autotrophs
B. Dimorphic fungi can switch forms when induced by different water concentrations
C. Fungi are obligate anaerobes
D. Fungi can be grown in high carbohydrate media
E. Fungi grow best at 25C, close to room temperature
E
True of dermatophytosis
A. Resistant to antibiotics
B. Involves the hair, skin, and nails
C. Spreads to other organs
D. Accompanies predisposing conditions
*
Tinea diseases are dermatophytoses caused by a group of fungi. Which of the following is not a dermatophyte?
A. Trichophyton
B. Microsporum
C. Epidermophyton
D. Emmonsiella
*
Ringworm infection of the scalp, eyebrows, and eyelashes
A. Tinea capitis B. Tinea cruris C. Tinea pedis D. Tinea versicolor E. White piedra
A
Madura’s foot
A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma
*
Rose gardener’s disease
A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma
*
Draining sinuses, soft or hard granules, and tumefaction of the bone are the triad of symptoms
A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma
*
Planate dividing scleroting bodies are also called “brown fission bodies” or “copper pennies” are seen microscopically
A. Sporotrichosis
B. Chromoblastomycosis
C. Phaeomycosis
D. Mycotic mycetoma
*
Common fungal smear used because of ability to dissolve keratin
A. 10% KOH
B. Lactophenol blue
C. PAS
D. India ink
A
Which of the following is a mass of intertwined hypal elements?
A. Mycelium
B. Rhizoids
C. Conidia
D. Arthrospora
A
What is the culture media used in the primary isolation of dermatophytes?
A. SDA
B. Nutrient agar
C. BHI agar
D. MacConkey agar
*
Environmental form of dimorphic fungi
A. Yeast
B. Mold
C. Both
D. Neither
B
Difference between mold and yeast?
a. Parasitic phase is mold phase.
b. Yeast are single-celled and reproduce by budding.
c. Both have pseudohyphase and blastoconidia.
d. Molds are filamentous and grow by branching pseudohyphae.
B
Which of the following situations that allow fungal microogranisms to be introduced into the host would not result in dermatophyte infection?
a. Playing with cat
b. Playing in soil
c. Inhailing conidia
d. Walking on soil
e. Sharing a towel
C
Dermatophyte infection
a. No chronic
b. Keratinized
c. Diffused alveolar
C
Which fungal elements is not normally found in the host’s body?
a. Reproductive mycelium
b. Vegetative
c. Yeast
d. Cyst
A
A mass of intertwined hyphal elements is called a mycelium. T/F
T
Conidia are specialized nonmotile structures with asexual spores (formed from?) hyphal wall. T/F
T
Fungi can also have sexual sporulation. T/F
T
Asexual fungi are medically significant fungi. T/F
T
Dimorphic fungus exist as yeast during sapropobic phase. T/F
F
The aerial mycelia is used for nutrition. T/F
T/F
In general, all of the following are characteristics of fungi EXCEPT
A. distinct nucleus B. cytoplasmic organelles with membranes C. chitin as major polysaccharide D. ALL of the above E. NONE of the above
E
The aerial mycelium is for
A. Reproduction
B. Nutrition
C. Anchor
D. Osmosis
A
What do you rarely not see…
A. Reproductive
B. Vegetative
C. Both
D. Neither
B
Mass of hyphae
A. Rhizoid
B. Mycelium
C. Arthrospores
D. Zygospores
B
Primary isolation culture media for dermatophytes
A. SDA
B. BHI
C. Nutrient Agar
D. MacConkey Agar
A
Which of the following is the most common cause of disease in hairshaft
A. pytiriasis versicolor
B. piedra nigra
C. tinea pedis
D. tinea nigra
B
In general, KOH of skin scrapings for Malassezia will show
A. yeast budding
B. hyphae filaments
C. both A and B
D. neither A and B
C
Subcutaneous mycoses are seen worldwide and the organisms are soil saprophytes. Which of the following routes will these agents of SQ mycoses be introduced to the host?
A. Ingestion
B. Inhalation of spore
C. Traumatic implantation
D. Inhalation of conidia
C
All of the following spores are asexual except:
A. Blastospores
B. Conidiospores
C. Zygospores
D. Sporangiospores
C
Yeasts are ____________organisms; Molds are __________organisms
A. microscopic; microscopic
B. unicellular; filamentous
C. motile; non motile
D. water; terrestrial
B
The most appropriate mounting medium used in viewing fungi
A. PAS
B. KOH
C. India ink
D. LPCB
B
