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MICRO > PRE-TEST PERC > Flashcards

PRE-TEST PERC Flashcards

1
Q

Isolation of Neisseria gonorrhoeae:

a. is enhanced by cold enrichment
b. requires incubation under increased CO2
c. from contaminated sites is made easier by the use of a selective medium such as CIN agar
d. for susceptibility testing is made on nutrient agar devoid of blood

A

.

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2
Q

A positive indole reaction is characteristic of:

a. Escherichia coli
b. Salmonella cholerae-suis
c. Proteus mirabilis
d. Serratia marcescens

A

.

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3
Q

On TSI agar, a gram negative bacillus produced a yellow slant and a yellow butt. Select the organism from the list below that would produce this reaction:

a. Shigella sonnei
b. Proteus mirabilis
c. Escherichia coli
d. Salmonella typhimurium

A

.

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4
Q

An identifying characteristic of Staphylococcus aureus is:

a. DNAse negative
b. Negative mannitol fermentation
c. Growth inhibition in the presence of increased salt
d. Positive coagulase test

A

Positive coagulase test

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5
Q

Vaccine component for tetanus.

a. toxoid
b. toxin
c. living attenuated microorganisms
d. killed virulent microorganisms
e. none of the above

A

toxoid

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6
Q

The medium recommended for the isolation of Neisseria gonorrhoeae is:

a. Fletcher medium
b. Thayer Martin medium
c. Red blood agar
d. Chocolate tellurite
e. Bordet-Gengou

A

Thayer Martin medium

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7
Q

Dark-field microscopy can be used to determine infections with:

a. Fusobacterium nucleatum
b. Treponema pallidum
c. Nocardia asteroids
d. Clostrdium difficile
e. Veilonella parvula

A

Treponema pallidum

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8
Q

A medium that aids in the presumptive identification of organisms based on their appearance on the medium is called:

a. Enriched
b. Selective
c. Differential
d. Specialized

A

.

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9
Q

An antibiotic that inhibits cell wall synthesis is:

a. Chloramphenicol
b. Penicillin
c. Sulfamethoxazole
d. Colistin

A

Penicillin

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10
Q

Diagnosis of typhoid fever during the first week can be confirmed best by culture of:

a. Stool
b. Urine
c. Blood
d. Bone marrow

A

Blood

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11
Q

The best medium for culture of Bordetella pertussis is:

a. Regan-Lowe agar
b. Cystine blood agar
c. Martin Lewis agar
d. Ashdown agar

A

Regan-Lowe agar

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12
Q

Which of the following is a gram positive to gram variable cocco-bacillus?

a. Staphylococcus epidermidis
b. Corynebacterium diphtheria
c. Listeria monocytogenes
d. Haemophilus influenzae

A

.

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13
Q

Listeria monocytogenes produces a positive result in which of the following biochemical test?

a. coagulase
b. lactose fermentation
c. Catalase
d. A and C

A

.

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14
Q

Which of the following will differentiate Listeria monocytogenes from the Corynebacterium?

a. non motile and salicin negative
b. motile and salicin positive
c. nitrate positive and sucrose negative
d. motile and urease negative

A

.

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15
Q

What color is a negative enzymatic hydrolysis of Tween 80 test?

a. red
b. amber
c. green
d. blue

A

amber

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16
Q

Mycobacterial cultures should be incubated:

a. in 5% carbon dioxide
b. in increased humidity
c. at 25°C
d. under anaerobic conditions

A

.

17
Q

For which clinical specimens is the potassium hydroxide direct mount technique for examination of fungal elements used?

a. Skin
b. CSF
c. Blood
d. Bone marrow

A

Skin

18
Q

The India ink stain is used as a presumptive test for the presence of which organism?

a. Aspergillus niger in blood
b. Cryptococcus neoformans in CSF
c. Histoplasma capsulatum in CSF
d. Candida albicans in blood or body fluids

A

Cryptococcus neoformans in CSF

19
Q

What is the first step to be performed in the identification of an unknown yeast isolate?

a. Gram stain smear
b. India ink stain
c. Catalase test
d. Germ tube test

A

Germ tube test

20
Q

Which of the following yeast enzymes is detected using birdseed (niger seed) agar?

a. Phenol oxidase
b. Catalase
c. Urease
d. Nitrate reductase

A

Phenol oxidase

21
Q

Which of the following yeasts is characteristically positive for germ tube production?

a. Candida tropicalis
c. Cryptococcus neoformans
b. Candida pseudotropicalis
d. Candida albicans

A

Candida albicans

22
Q

Classification of viruses is made by:

a. Complement fixation serology
b. Electron microscopy
c. Nucleic acid composition
d. Cellular inclusions bodies

A

.

23
Q

Hepatitis B virus can be transmitted by:

a. Acupuncture
b. Tatoos
c. Sexual contact
d. All of the above

A

All of the above

24
Q

Which virus is associated with venereal and respiratory tract warts and produces lesions of skin and mucous membranes?

a. Polyomavirus
b. Poxvirus
c. Adenovirus
d. Papillomavirus

A

Papillomavirus

25
Q

A clinical test used for the detection and identification of viral infections other than culture is:

a. Hemagglutination
b. Hemadsorption
c. Viral antigen detection
d. AOTA

A

.

MICRO (7 decks)

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