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Microbiology > Fungi I > Flashcards

Fungi I Flashcards

1
Q

Fungi reproduce by:

Bacteria reproduce by:

A

Fungi reproduce by budding/mitosis

Bacteria reproduce by binary fission

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2
Q

Fungal cell walls contain:

A. Peptidoglycan
B. Endotoxins
C. LPS
D. Chitin

A

D. Chitin

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3
Q

Optimal temperature for virulence of most fungi:

A. 37 degrees
B. 33 degrees
C. 30 degrees
D. 25 degrees

A

A. 37

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4
Q

What are dimorphism fungi?

A

Fungi that can grow as yeast or molds

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5
Q

Sporangiospores vs conidiophores

A

Sporangiospores - Spores contained in sporangium released when sporangium ruptures; develop by successive cleavages inside psorangium

Conidiophores - Free spores; develop either by pinching off tip of fertile hypha or by segmentation of a vegetative hypha

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6
Q

Main advantage of sexual spores

A

Increases genetic variation

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7
Q

Sexual spores: two strains mate –> hyphae fuse –> diploid zygote

Example: Rhizopus

A

Zygomycota

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8
Q

Spores formed within a fungal sac (ascus)

Examples: Aspergillus, penicillin, Candida albicans, histoplasmosis capsulatum

A

Ascomycota

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9
Q

Spore supported by slub-like structure (basidium)

Examples: Mushrooms, cryptococcosis immitis

A

Basidiomycota

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10
Q

Anamorphic fungi, imperfect fungi, unknown sexual reproduction, dermatophytes

EXample: Coccidiodes immitis

A

Deuteromycota

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11
Q

Optimal temperature for superficial growth of fungi

A. 20-25 degrees C
B. 25-30 degrees C
C. 30 degrees C
D. 37 degrees C

A

B. 25-30

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12
Q

Optimal overall temperature for growth of fungi

A. 20-25 degrees C
B. 25-30 degrees C
C. 30 degrees C
D. 37 degrees C

A

C. 30

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13
Q

Optimal temperature for SubQ/Deep growth of mold

A. 20-25 degrees C
B. 25-30 degrees C
C. 30 degrees C
D. 37 degrees C

A

B. 25-30

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14
Q

Optimal temperature for SubQ/Deep growth of yeast

A. 20-25 degrees C
B. 25-30 degrees C
C. 30 degrees C
D. 37 degrees C

A

D. 37

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15
Q

Why is it advantageous for fungi to be dimorphic and grow as molds at 30 degrees C but grow as yeasts at 37 degrees?

A

Confers ability to survive at diff environmental conditions

Survive at high temperatures inside animals rather infect by morphing into yeast

Survive in natural habitat (external environment) at 30 degrees C as molds

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16
Q

5 types of dimorphic fungi

A 
His - Histoplasma
Best - Blastomyces
Skill - Sporothrix
Conferring - Coccioides
Change - Candida
17
Q

What type of media is for fungi?

A

Sauberad-Dextrose agar

18
Q

California earthquakes associated with increased:

A. Aspergillus fumigatus
B. Histoplasmosis
C. Coccidiodomycosis
D. Candida

A

C. Coccidiodomycosis

19
Q

Construction near hospitals is associated with increased:

A. Aspergillus fumigatus
B. Histoplasmosis
C. Coccidiodomycosis
D. Candida

A

A. Aspergillus fumigatus

20
Q

Tree cutting associated with outbreaks of:

A. Aspergillus fumigatus
B. Histoplasmosis
C. Coccidiodomycosis
D. Candida

A

B. Histoplasmosis

21
Q

Fungal pathogens that are geographically restricted:

A. Endemic mycoses
B. Opportunistic mycoses
C. SubQ mycoses
D. Superficial and cutaneous mycoses

22
Q

Fungal pathogens that affect mostly immunosuppressed individuals and can be life-threatening

A. Endemic mycoses
B. Opportunistic mycoses
C. SubQ mycoses
D. Superficial and cutaneous mycoses

23
Q

Fungal pathogens that involve skin, subQ tissues, and lymphatic system

A. Endemic mycoses
B. Opportunistic mycoses
C. SubQ mycoses
D. Superficial and cutaneous mycoses

24
Q

Fungal pathogens limited to skin and skin structures

A. Superficial and cutaneous mycoses
B. Endemic mycoses
C. Opportunistic mycoses
D. SubQ mycoses

25
Q

Which is a superficial mycoses that involves mucous membranes, skin, and nails:

A. Coccidiodes immitis
B. Blastomyces dermatitis
C. Candida albicans
D. Cryptococcosis neoformans

A

C. Candida albicans

Aka yeast infection

Mucosal surface - vagina

26
Q

T/F: Fungi secrete pathogens

A

False, fungi do NOT secrete pathogens

27
Q

Why is it difficult to find anti microbial agents for fungi?

A

Close similarity between animals and fungi

Similar evolution
Both eukaryotes
Came from same ancestors

28
Q

Which of the following explains how soil microbes developed ability to evade human immune system?

A. Predation by soil based organisms selected for fungi that can survive in phagosome and escape predator
B. Developed ability to secrete toxins that kill immune cells
C. Infect immunocomprimised individuals
D. They cannot evade human immune system
E. Both A and C
F. Both A and B

A

E. Both A and C

Microbiology (3 decks)

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