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Mycology & Virology > SAS 1 > Flashcards

SAS 1 Flashcards

1
Q

They produce moist, creamy, opaque or pasty colonies 0.5-3.0 mm in dm on culture media

A

Yeast

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2
Q

Most reproduce by asexual budding, few by binary fission

A

Yeast

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3
Q

Produces multicellular filamentous colonies: Fluffy, cottony, wooly or powdery

A

Mold

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4
Q

the basic structural unit of mold

A

Hyphae

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5
Q

COMMON FORMS OF HYPHAE

Curved, freely branching and antler in appearance

A

Antler Hyphae/Favic Chandelier

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6
Q

COMMON FORMS OF HYPHAE

Enlarged, club-shaped with the smaller end attached to the large end of the adjacent club-shaped strands

A

Racquet hyphae

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7
Q

COMMON FORMS OF HYPHAE

Coiled or corkscrew seen within hyphal strands, Frequently found in dermatophytes

A

Spiral hyphae

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8
Q

The capability of an organism to grow in more than one form under different environment

A

Dimorphism

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9
Q

Example of an organism that shows Dimorphism

A

Sporothrix schenkii

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10
Q

An organism that grows only in one form ( mold/ Sparobic/ hyphal)may it be at room temperature or at a higher temp

A

Monomorphic

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11
Q

perfect fungus; is associated with the formation of specialized structures that facilitates fertilization and nuclear fission resulting in the formation of specialized spores

A

Sexual (Teleomorph)

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12
Q

Types of Teleomorph

A

A. Zygospores/Zygomycetes
B. Ascospores/Ascomycetes
C. Basidiospores/Basidiomycetes
D. Oospores

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13
Q

Types of Teleomorph

derived from fusion of identical cells from the same hyphae

A

Zygospores/Zygomycetes

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14
Q

Types of Teleomorph

enclosed in a specific sac called ascus (asci)

A

Ascospores/Ascomycetes

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15
Q

Types of Teleomorph

enclosed in a club-shaped structures called basidia or basidium

A

Basidiospores/Basidiomycetes

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16
Q

Types of Teleomorph

derived from fusion of non-identical cells from the same hyphae

A

Oospores

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17
Q

imperfect fungus (Fungus imperfecti) ; a new colone is formed without the involvement of a gamete and without nuclear fusion; a type of sporulation seen in most fungi encountered I the clinical laboratory and occurs strictly by mitosis

A

Asexual (anamorph)

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18
Q

derived from the cells of the thallus or body of the fungi

A

Thalospores

19
Q

TYPES OF THALOSPORES

A

Blastospores
Arthrospores/Arthroconidia
Oidia
Chlamydospores/Chlamydoconidia
Sporangiospores

20
Q

TYPES OF THALOSPORES

Buds formed by budding process, sprouting from the surface of the parent cell

A

Blastospores

21
Q

TYPES OF THALOSPORES

Arise by fragmentation of the ends of hyphae at the point of septation; square barrel-shaped thick walled cells

A

Arthrospores/Arthroconidia

22
Q

TYPES OF THALOSPORES

When hyphal cells separate from one another to form flat ended spores

A

Oidia

23
Q

TYPES OF THALOSPORES

Enlarged, round unicellular thick-walled structures that are formed during unfavorable conditions; formed by the enlargement of a hyphal cell

A

Chlamydospores/Chlamydoconidia

24
Q

3 types of Chlamydospores/Chlamydoconidi a

A
  1. Terminal
  2. Intercallary
  3. Sessile
25
Q

3 types of Chlamydospores/Chlamydoconidia

found at the hyphal tip

A

Terminal

26
Q

3 types of Chlamydospores/Chlamydoconidia

found within the hyphal strands

A

Intercallary

27
Q

3 types of Chlamydospores/Chlamydoconidia

found at the side of the hyphal strand

A

Sessile

28
Q

TYPES OF THALOSPORES

Born internally within a sac called “SPORANGIUM”, which develops at the tip of the sporangiophore

A

Sporangiospores

29
Q

Example of Blastospores

A

Candida albicans
Cryptococcus neoformans

30
Q

Example of Oidia

A

Geotrichum candidum

31
Q

asexual spores produces singly or in groups (en-grape) by specialized vegetative strands/branch called Conidiphore (borne externally not with in)

A

Conidia

32
Q

Some conidiophore terminate into swollen structure called

A

VESICLE

33
Q

From the surface of the vesicle are formed secondary flask-shaped or bottle called ______ which in turn give rise to long chains of conidia as seen in Aspergillus

A

PHIALIDES or STERIGMA

34
Q

2 Sized of Conidia

  • Small, unicellular conidia, maybe round, elliptical or pyriform (pear-shaped)
  • Usually born directly on the side of the hyphal strands or at the end of a long or short conidiophore
A

Microconidia/Microaleuriospores

35
Q

2 Sized of Conidia

  • Large, multicellular conidia; multi-septate, clavate or spindle-shaped - Usually borne on a short to long conidiophore
A

Macroconidia/Macroaleriospores

36
Q

To see if fungus is a contaminant with bacterium

A

Gram Staining (Permanent Mounts)

37
Q

Best for visualizing fungi in skin scraping or tissue If dematiaceous, appears as dark brown/black

A

PAS

38
Q

Excellent for staining yeast cells of H. capsulatum in tissue

A

Wright’s Stain or Giemsa

39
Q

Best stain for B. dermatitidis

A

Papanicolau method

40
Q

Ideal for T. versicolor

A

Acridine Orange

41
Q

Useful in the differentiation of Nocardia from Actinomyces Hyphae of Nocardia steroids and Nocardia brasilliensis are partially acid fast

A

Acid Fast Stain (Kinyoun)

42
Q

Rough and spiny conidia

A

Echinulate

43
Q

Conidia in chain

A

Catenate

Mycology & Virology (10 decks)

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