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Internship 2025 > Bacte/Histopath MRXUH Exam > Flashcards

Bacte/Histopath MRXUH Exam Flashcards

1
Q

Quellung test is used to identify which strep spp.

a. S. pyogenes
b. S. agalactiae
c. S. sanguis
d. S. pneumoniae

A

d. S. pneumoniae

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2
Q

The salt tolerance test (6.5%) is used for presumptive identify:

a. Group D Non-enterococci
b. Enterococci
c. Viridans
d. S. Pneumoniae

A

b. Enterococci

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3
Q

The dye used to stain Mycobacterium

A. Methylene Blue
B. Carbol Fuschin
C. Crystal Violet
D. Iodine

A

B. Carbol Fuschin

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4
Q

The symptoms of scarlet fever are due to

A. Streptolysin
B. Coagulase
C. Erythrogenic toxin
D. Alpha toxin

A

C. Erythrogenic toxin

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5
Q

The Schultz-Charlton phenomenon refers to a lab test for suspected cases of

A. Pneumonia
B. Scarlet fever
C. Diphtheria
D. Erysipelas

A

B. Scarlet fever

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6
Q

Which of the following would differentiate S. Aureus and S. Epidermidis

A. Mannitol fermentation
B. Catalase
C. Novobiocin
D. OF test

A

A. Mannitol fermentation

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7
Q

Which of the following would differentiate N. Meningitidis and N. Gonorrhea

A. Glucose fermentation
B. Sucrose fermentation
C. Maltose fermentation
D. AOTA

A

D. AOTA

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8
Q

Which of the following is destroyed by oxygen

A. Botulism
B. Streptolysin O
C. Catalase
D. Coagulase

A

B. Streptolysin O

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9
Q

Neisseria meningitidis degrades which of the following sugars?

A. Glucose
B. Maltose
C. Lactose
D. A & b

A

D. A & b

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10
Q

What is the indicator in Simmons citrate agar?

A. Phenol red
B. Bromthymol blue
C. Bromcresol purple
D. Neutral red

A

B. Bromthymol blue

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11
Q

Green metallic sheen on EMB

A

Yersinia enterocolitica

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12
Q

Mucoidal colonies on EMB

A

Yersinia pestis

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13
Q

Fish eye colonies on EMB

A

Campylobacter

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14
Q

Bull’s eye colonies on CIN

A

Escherichia coli

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15
Q

Creamy whiten opaque on BAP

A

Haemophilus ducreyi

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16
Q

Pinpoint on BAP

A

Klebsiella

17
Q

Safety pin appearance

A

Bordetella pertusis

18
Q

School fish appearance

A

Eikenella corrodens

19
Q

Seagull wings

A

Enterobacter

20
Q

Mercury droplets

A

Clostridium perfringens

21
Q

Pitting/corroding

A

Bacillus anthracis

22
Q

Medusa head

A

Staphylococcus

23
Q

Boxcar

A

Capnocytophaga

24
Q

Gilding motility

A

Thermophile

25
Q

Heat loving bacteria

A

Streptococcus

26
Q

Ziehl-Neelseen AFB stain whole procedure with interpretation

A
  1. Carbol fuchsin - primary
  2. Heat - allow penetration
  3. Acid alcohol - decolorizer
  4. Methylene Blue - counterstain

Interpretation
Positive - red
Negative - blue

Internship 2025 (9 decks)

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