Opportunistic Mycoses

Question 1

only opportunistic fungal species that exhibits thermal dimorphism

Answer 1

Candida albicans

Question 2

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.

Answer 2

A

Question 3

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

Answer 3

C

Question 4

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

Answer 4

D

D c/o aspergillosis
balanitis:candidiasis @ penis

Question 5

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

Answer 5

satellite lesions

Question 6

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

Answer 6

C

Question 7

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

Answer 7

D

Question 8

easiest and fastest way of differentiating Candida species

Answer 8

Germ tube formation

Question 9

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

Answer 9

a

Question 10

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

Answer 10

B

Question 11

Which Candida species produces germ tube

Answer 11

Candida albicans

Question 12

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

Answer 12

C

Question 13

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

false about Cryptococcus

Answer 13

D

Question 14

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

Answer 14

laccase

Question 15

laccase is found in which Cryptococcus species?

Answer 15

C. neoformans

C. gattii

Question 16

main components of Cryptococcus’ capsular polysaccharide

Answer 16

polymannose,xylose and glucuronic acid.

Question 17

Cryptococcus can produce __, which protects it from oxidative killing

Answer 17

melanin

Question 18

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)

Answer 18

B

inhibited dapat

Question 19

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

Answer 19

C

Question 20

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

Answer 20

The latex slide agglutination test

Question 21

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

Answer 21

A

septate dapat

Question 22

most common Aspergillus species that causes disease

Answer 22

Aspergillus fumigatus

Question 23

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

Answer 23

B (Globate head kasi)

Question 24

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

Answer 24

C (pitted conidiophore kasi)

Question 25

true or false: Aspergillus fumigatus is inhibited by cyclohexamide

Answer 25

True

Question 26

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

Answer 26

D 45 degrees dapat

Question 27

allergic bronchopulmonary aspergillosis ensues when the fungus ___

Answer 27

Colonizes the bronchial tree without invading | the lung parenchyma

Question 28

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

Answer 28

D I and III dapat

Question 29

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

Answer 29

fungus balls

Question 30

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

Answer 30

invasive aspergillosis

Question 31

Serologic test for circulating cell wall ___ is | diagnostic for aspergillosis

Answer 31

galactomannan

Question 32

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

Answer 32

acute

Question 33

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

Answer 33

A

Question 34

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

Answer 34

Posaconazole

Question 35

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

Answer 35

B

Question 36

A)Rhizopus B)Absidia C)Cunninghamella D)Exophiala Which does not cause mucormycosis?

Answer 36

D

Question 37

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

Answer 37

rhinocerebral mucormycosis

Question 38

``` 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 ```

Answer 38

B

Question 39

drug for mucormycosis

Answer 39

amphotericin B,

Question 40

opportunistic fungus that cause pneumonia in AIDS patients

Answer 40

Pneumocystis jiroveci

Question 41

enumerate the two forms of Pneumocystis jiroveci

Answer 41

Thin-walled trophozoites | Thick-walled cysts

Question 42

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

Answer 42

bilateral infiltrates.

Question 43

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

Answer 43

B

Question 44

T or F. Pneumocystis jiroveci can be cultured.

Answer 44

F

Question 45

The only dimorphic penicillium

Answer 45

Penicillium marneffei