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PH 152 > Opportunistic Mycoses > Flashcards

Opportunistic Mycoses Flashcards

1
Q

only opportunistic fungal species that exhibits thermal dimorphism

A

Candida albicans

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2
Q

Which is false?
A. Diagnosis of opportunistic mycoses does not require high index of suspicion.
B. The lower your host’s resistance is, the higher the chances of disease.
C. Anti-neoplastics, TB and AIDS may increase one’s chance of getting opportunistic mycoses.

A

A

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3
Q

Candida grows best at __ pH
A.acidic
B.Neutral
C.Alkaline

A

C

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4
Q 
Which is not caused by Candida?
A.oral thrush
B.angular cheilitis
C.balanitis
D.fungus balls
A

D

D c/o aspergillosis
balanitis:candidiasis @ penis

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5
Q

identify: typical skin lesions of Candida, especially @ the feet

A

satellite lesions

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6
Q 
The ff are adjectives used to describe Candida lesions except
A.whitish
B.erythematous
C.dematiacous
D.none of the above
A

C

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7
Q 
What makes C.glabrata unique?
A.no thermal dimorphism
B.no pseudohyphae
C.no yeast cells
D.A and B
E.B and C
A

D

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8
Q

easiest and fastest way of differentiating Candida species

A

Germ tube formation

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9
Q 
in CHROMagar media, C.albicans produces culture that is color
A.green
B.pink
C.yellow
D.white
A

a

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10
Q 
in CHROMagar media, C.glabrata produces culture that is color
A.green
B.pink
C.yellow
D.white
A

B

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11
Q

Which Candida species produces germ tube

A

Candida albicans

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12
Q

Basidiomycetous yeasts with large polysaccharide
capsules, found in dry pigeon feces or trees @ tropical regions
A.Aspergillus
B.Candida
C.Cryptococcus
D.Rhizopus

A

C

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13
Q

A.whitish mucoid colonies
B.with capsule
C.possess urease
D.with pseudohyphae

false about Cryptococcus

A

D

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14
Q

phenol oxidase, which catalyzes
the formation of melanin from appropriate phenolic
substrates

A

laccase

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15
Q

laccase is found in which Cryptococcus species?

A

C. neoformans

C. gattii

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16
Q

main components of Cryptococcus’ capsular polysaccharide

A

polymannose,xylose and glucuronic acid.

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17
Q

Cryptococcus can produce __, which protects it from oxidative killing

A

melanin

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18
Q

False about culture of Cryptococcus
A. Slimy or mucoid colonies
B. Growth is promoted by cycloheximide
C. Can be identified by the detection of urease
D. Brown pigment due to phenol oxidase (or laccase)

A

B

inhibited dapat

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19
Q 
main complications of Cryptococcus involves
A.stomach
B.heart
C.lungs
D.all of the above
A

C

20
Q

The ___ for cryptococcal
antigen is positive in 90% of patients with cryptococcal
meningitis.

A

The latex slide agglutination test

21
Q 
false about Aspergillus
A. Branching, aseptate mycelium
B. Characteristic conidial head
C. Mold form
D. Invades the lungs and other tissues
A

A

septate dapat

22
Q

most common Aspergillus species that causes disease

A

Aspergillus fumigatus

23
Q

Which does not have a clavate head?
A. Aspergillus fumigatus
B. Aspergillus niger
C. Aspergillus flavus

A

B (Globate head kasi)

24
Q

Which does not have smooth conidiophore?
A. Aspergillus fumigatus
B. Aspergillus niger
C. Aspergillus flavus

A

C (pitted conidiophore kasi)

25
Q

true or false: Aspergillus fumigatus is inhibited by cyclohexamide

A

True

26
Q

false about Aspergillus fumigatus
A. produces aerial hyphae
B. long conidiophores with terminal vesicles
C. phialides (at vesicles)produce basipetal chains of conidia
D. septated, dichotomous, 90° angle branching hyphae

A

D

45 degrees dapat

27
Q

allergic bronchopulmonary aspergillosis ensues when the fungus ___

A

Colonizes the bronchial tree without invading

the lung parenchyma

28
Q

Which does not happen in allergic bronchopulmonary aspergillosis?
A.asthma
B.recurrent chest infiltrates
C.eosinophilia
D.both type I & II hypersensitivity to Aspergillus antigen

A

D

I and III dapat

29
Q

Aspergillus fumigatus creates ___ when its inhaled conidia enter an existing cavity, germinate, and produce abundant hyphae in the abnormal extrapulmonary spaces.

A

fungus balls

30
Q

A.Hyphae invade the lumens and walls of the blood
vessels, causing thrombosis, infarction, and necrosis
B. From the lungs, it may spread to the gastrointestinal
tract, kidney, liver, brain, or other organs, producing
abscesses and necrotic lesions

identify the clinical manif caused by Aspergillus fumigatus

A

invasive aspergillosis

31
Q

Serologic test for circulating cell wall ___ is

diagnostic for aspergillosis

A

galactomannan

32
Q

in histologic sections, the hyphae of Aspergillus fumigatus are uniform in width and branch at ___ angle
dichotomously

A

acute

33
Q

Where can surgery be used as treatement?
A.Aspergilloma
B.Allegic Bronchiopulmonary Aspergillosis
C.Extrinsic allergic alveolitis

A

A

34
Q

For Amphotericin B-resistant strains of A. terreus and
other species including A. flavus and A. lentulus,
__ is used.

A

Posaconazole

35
Q

Corticosteroids or Disodium Chromoglycate are used in treatment of?
A.Aspergilloma
B.Allegic Bronchiopulmonary Aspergillosis
C.Extrinsic allergic alveolitis

A

B

36
Q

A)Rhizopus
B)Absidia
C)Cunninghamella
D)Exophiala

Which does not cause mucormycosis?

A

D

37
Q

identify the clinical manifestation of mucormycosis
A. Results from germination of the sporangiospores in the
nasal passages and invasion of the hyphae into the
blood vessels
B. Patients develop facial edema, bloody nasal exudate, and orbial cellulitis

A

rhinocerebral mucormycosis

38
Q 
morphology of zygomycosis  etiologic agents
A. septate with right angle branching
B. aseptate with right angle branching
C. aseptate with acute angle branching
D. septate with acute angle branching
A

B

39
Q

drug for mucormycosis

A

amphotericin B,

40
Q

opportunistic fungus that cause pneumonia in AIDS patients

A

Pneumocystis jiroveci

41
Q

enumerate the two forms of Pneumocystis jiroveci

A

Thin-walled trophozoites

Thick-walled cysts

42
Q

There probably is P.jiroveci if __ are seen in chest radiography

A

bilateral infiltrates.

43
Q 
Which is not an appropriate stain for micro exam of P.jiroveci?
A.Giemsa
B.Gram
C.methenamine silver
D.calcofluor white
A

B

44
Q

T or F. Pneumocystis jiroveci can be cultured.

A

F

45
Q

The only dimorphic penicillium

A

Penicillium marneffei

PH 152 (47 decks)

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