MYCOVIRO - CH 60 of book part 2

Question 1

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

Answer 1

macroconidia

Question 2

Type of conidia of microsporum spp

-small, club-shaped, born on hyphae

Answer 2

microconidia

Question 3

most important cause of tinea capitis; anthropophilic

Answer 3

M. audouinii

Question 4

infected hairs: yellow-green under Wood’s lamp

Answer 4

M. audouinii

Question 5

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

Answer 5

M. audouinii

Question 6

reverse side: salmon-pink to reddish brown

Answer 6

M. audouinii

Question 7

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

Answer 7

M. audouinii

Question 8

favic chandeliers, pectinate bodies

Answer 8

M. audouinii

Question 9

does not grow on rice

Answer 9

M. audouinii

Question 10

anthropophilic microsporum

Answer 10

M. audouinii

Question 11

zoophilic microsporum

Answer 11

M. canis

Question 12

causes ringworm infection in dogs and cats

Answer 12

M. canis

Question 13

fluoresce bright yellow-green under Wood’s lamp

Answer 13

M. canis

Question 14

small spores outside the hair (ectothrix)

Answer 14

M. canis

M. gypseum

Question 15

growth on rice used to differentiate which Microsporum species

Answer 15

Audouinii (-) and canis (+)

Question 16

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

Answer 16

M. canis

Question 17

• reverse side: bright yellow

Answer 17

M. canis

Question 18

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

Answer 18

M. canis

Question 19

• microconidia: rare, few

Answer 19

M. canis

Question 20

• grows on rice

Answer 20

M. canis

Question 21

geophilic microsporum

Answer 21

M. gypseum

Question 22

does not fluoresce under Wood’s lamp

irregularly covered with arthroconidia

Answer 22

M. gypseum

Question 23

• ectothrix infection: hair

Answer 23

M. canis

M. gypseum

Question 24

• reverse side: orange to brownish

Answer 24

M. gypseum

Question 25

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

Answer 25

M. gypseum

Question 26

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

Answer 26

M. gypseum

Question 27

rapid-growing microsporum

Answer 27

canis and gypseum

Question 28

ellipsoidal macroconidia

Answer 28

M. gypseum

Question 29

spindle-shaped macroconidia

Answer 29

M. canis

Question 30

thick-walled macroconidia

Answer 30

M. gypseum

Question 31

- bamboo hyphae

Answer 31

M. ferruginum

Question 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.

Answer 32

Opportunistic fungal infections

Question 33

- tissue invasive infections that occur in immunocompromised hosts

Answer 33

OPPORTUNISTIC MYCOSES

Question 34

- common cause of tinea pedis and tinea cruris

Answer 34

E. floccosum

Question 35

- susceptible to cold; specimens should not be refrigerated

Answer 35

E. floccosum

Question 36

- calcofluor white or KOH: fine branching hyphae

Answer 36

E. floccosum

Question 37

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

Answer 37

E. floccosum

Question 38

- microconidia: absent

Answer 38

E. floccosum

Question 39

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

Answer 39

E. floccosum

Question 40

a fungus ball of the external auditory canal

Answer 40

otomycosis

Question 41

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

Answer 41

onychomycosis

Question 42

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

Answer 42

Aspergillus spp.

Question 43

Aspergillus may produce what substance

Answer 43

aflatoxin (hepatotoxin)

Question 44

cause of fungus ball and otitis externa

Answer 44

A. niger

Question 45

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

Answer 45

A. flavus

Question 46

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

Answer 46

Fusarium spp.

Question 47

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

Answer 47

Geotrichum candidum

Question 48

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

Answer 48

Acremonium spp.

Question 49

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

Answer 49

Penicillium spp.

Question 50

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

Answer 50

Paecilomyces spp.

Question 51

Hyaline, septate, monomorphic molds | Associated with arthritis

Answer 51

Paecilomyces spp.

Question 52

Hyaline, septate, monomorphic molds | Associated with cutaneous infections

Answer 52

Paecilomyces spp.

Question 53

endocarditis, fungemia and invasive disease

Answer 53

P. variotii

Question 54

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

Answer 54

Scopulariopsis spp.

Question 55

associated with fungus ball

Answer 55

Scopulariopsis spp.

Question 56

associated with pulmonary infection

Answer 56

Scopulariopsis spp.

Question 57

what to observe for opportunistic mycoses

Answer 57

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

Question 58

Antigen-Protein assay: | targets antigens of Aspergillus spp.

Answer 58

Galactomannan assay

Question 59

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

Answer 59

Beta-glucan assay

Question 60

susceptible to cycloheximide

Answer 60

Aspergillus spp.

Question 61

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

Answer 61

A. fumigatus

Question 62

Aspergillus spp. resistant to ampicillin B

Answer 62

A. terreus

Question 63

A. terreus resistant to what antibiotic

Answer 63

ampicillin B