MYCOVIRO - CH 60 of book part 2 Flashcards Preview

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Flashcards in MYCOVIRO - CH 60 of book part 2 Deck (63):
1

Type of conidia of microsporum spp
-large, spindle-shaped, echinulate, rough-walled, septated
-

macroconidia

2

Type of conidia of microsporum spp
-small, club-shaped, born on hyphae

microconidia

3

most important cause of tinea capitis; anthropophilic

M. audouinii

4

infected hairs: yellow-green under Wood’s lamp

M. audouinii

5

colony: velvety aerial mycelium that is colorless to light gray to tan

M. audouinii

6

reverse side: salmon-pink to reddish brown

M. audouinii

7

terminal chlamydoconidia, antler (curved, freely branching) and raquet (enlarged, club-shaped) hyphae

M. audouinii

8

favic chandeliers, pectinate bodies

M. audouinii

9

does not grow on rice

M. audouinii

10

anthropophilic microsporum

M. audouinii

11

zoophilic microsporum

M. canis

12

causes ringworm infection in dogs and cats

M. canis

13

fluoresce bright yellow-green under Wood’s lamp

M. canis

14

small spores outside the hair (ectothrix)

M. canis
M. gypseum

15

growth on rice used to differentiate which Microsporum species

Audouinii (-) and canis (+)

16

- colony: granular or fluffy with feathered border, white to buff, lemon-yellow to yellow-orange fringe at
the periphery



M. canis

17

- reverse side: bright yellow

M. canis

18

- macroconidia: spindle-shaped, echinulate (with spiny projections), thick-walled and with curved ends

M. canis

19

- microconidia: rare, few

M. canis

20

- grows on rice

M. canis

21

geophilic microsporum

M. gypseum

22

does not fluoresce under Wood’s lamp
irregularly covered with arthroconidia

M. gypseum

23

- ectothrix infection: hair

M. canis
M. gypseum

24

- reverse side: orange to brownish

M. gypseum

25

macroconidia: thick-walled, large, ellipsoidal, with rounded ends, echinulate surface

M. gypseum

26

- colony: flat, irregularly fringed, coarse and powdery surface, buff or cinnamon color

M. gypseum

27

rapid-growing microsporum

canis and gypseum

28

ellipsoidal macroconidia

M. gypseum

29

spindle-shaped macroconidia

M. canis

30

thick-walled macroconidia

M. gypseum

31


- bamboo hyphae

M. ferruginum

32

_____ are typically identified in a host compromised by some underlying disease process, such as lymphoma, leukemia, diabetes mellitus, or another defect of the immune system.

Opportunistic fungal infections

33


- tissue invasive infections that occur in immunocompromised hosts

OPPORTUNISTIC MYCOSES

34

- common cause of tinea pedis and tinea cruris



E. floccosum

35

- susceptible to cold; specimens should not be refrigerated

E. floccosum

36

- calcofluor white or KOH: fine branching hyphae

E. floccosum

37

- colony: olive-green to khaki, dull orange-brown periphery, cottony white aerial mycelium

E. floccosum

38


- microconidia: absent

E. floccosum

39


- macroconidia: smooth, thin-walled, club-shaped (beaver-tail), multiseptate

E. floccosum

40

a fungus ball of the external auditory canal

otomycosis

41

(infection of the nail and sur- rounding tissue),

onychomycosis

42

causes disseminated infections: pulmonary or sinus fungus ball, allergic pulmonary aspergillosis, external otomycosis, mycotic keratitis, onychomycosis, sinusitis, endocarditis, CNS infection

Aspergillus spp.

43

Aspergillus may produce what substance

aflatoxin (hepatotoxin)

44

cause of fungus ball and otitis externa

A. niger

45

what aspergillus spp
from nasal cultures --> subsequent invasive aspergillosis

A. flavus

46

Hyaline, septate, monomorphic molds
may cause mycotic keratitis, disseminated fusariosis with fungemia and necrotic skin
lesions
recovered from respiratory tract secretions and skin

Fusarium spp.

47

Hyaline, septate, monomorphic molds
causes wound infection and oral thrush

Geotrichum candidum

48

Hyaline, septate, monomorphic molds
associated with disseminated infection, fungemia, subcutaneous lesions, and
esophagitis

Acremonium spp.

49

Hyaline, septate, monomorphic molds
may cause allergic bronchopulmonary penicilliosis or chronic allergic sinusitis

Penicillium spp.

50

Hyaline, septate, monomorphic molds
Associated with endophthalmitis, cutaneous infections and arthritis

Paecilomyces spp.

51

Hyaline, septate, monomorphic molds
Associated with arthritis

Paecilomyces spp.

52

Hyaline, septate, monomorphic molds
Associated with cutaneous infections

Paecilomyces spp.

53

endocarditis, fungemia and invasive disease

P. variotii

54

associated with onychomycosis, pulmonary infection, fungus ball and invasive fungal
disease

Scopulariopsis spp.

55

associated with fungus ball

Scopulariopsis spp.

56

associated with pulmonary infection

Scopulariopsis spp.

57

what to observe for opportunistic mycoses

observe septate hyphae with dichotomous branching; some may have rounded, thick-walled cells

58

Antigen-Protein assay:
targets antigens of Aspergillus spp.

Galactomannan assay

59

Antigen-Protein assay
detects antigens common to all clinically important fungi

Beta-glucan assay

60

susceptible to cycloheximide

Aspergillus spp.

61

most commonly recovered Aspergillus spp.
species most often seen in the clinical laboratory

A. fumigatus

62

Aspergillus spp. resistant to ampicillin B

A. terreus

63

A. terreus resistant to what antibiotic

ampicillin B

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