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Flashcards in Anaerobes Deck (25):
1

Which describes clostridium perfringens?
A) Non-capsulated
B) Motile
C) produces double zone hemolysis on blood agar

C) produces double zone hemolysis on blood agar

2

What is a property of the toxin released by clostridium botulinum?

inhibits acetylcholine release

3

A case of 28 years old with brain abscess what’s most likely to be the cause of the disease? (IMPORTANT Q)
A) Anaerobe streptococci
B) Clostridium perfringens
C) Fusobacterium

A) Anaerobe streptococci

4

What is a source Clostridium botulinum toxin? ('15 final)
A) Canned food
B) fresh vegetables

A) Canned food

5

Which of the following anaerobes creates black colonies on blood agar?

Porphyromonas gingivalis

6

What is a characteristic of Anaerobes?

Low redox –Eh

7

what is the mechanism of action of botulinum toxin? ('15 final)
A) Block acetylcholine transmission
B) Deplete acetylcholine reserves

A) Block acetylcholine transmission

8

What anaerobic bacteria produces double zone of hemolysis on a blood agar?
A) Clostridium perfringens
B) Clostridium difficile
C) Clostridium botulinum

A) Clostridium perfringens

9

Which of the following organisms produce endospores?

Clostridium botulinum

10

What enzyme do anaerobic bacteria lack?

Superoxide dismutase

11

What disease is caused by Clostridium difficile?

Pseudomembranous colitis

12

Which of the following is true regarding bacteroides fragilis? (11' final)

Causes a mixed infection following abdominal surgery

13

Which anaerobes causes intraabdominal abscess after surgery ?

Bacteriodes fragilis

14

What anaerobic bacteria produces double zone of hemolysis on a blood agar?

Clostridium perfringens

15

Which of the following organisms produce endospores?

Clostridium botulinum

16

What enzyme do anaerobic bacteria lack?

Superoxide dismutase

17

A man and his wife went to a Chinese restaurant and had rice. Shortly after they developed abdominal pain and started vomiting. What is the causative agent?

Bacillus Cereus

18

What Enzyme do anaerobic bacteria lack?

Superoxide dismutase

19

Which of the following forms endospores?(FB2 2013)

Clostridium botulinum

20

Which of the following is a predisposing factor to get clostridium difficile infection? (FB2 2013 )

Hospitilization in geriatric ward

21

Which microorganism shows drumstick appearance under the microscope?(Final 2013)
A. Clostridium botulinum
B. Clostridium perfringens
C. Clostridium tetani

Clostridium tetani

22

What enzyme do anaerobic bacteria lack?( FB2 2014 )

Superoxide dismutase

23

What differentiates between clostridium tetanus from clostridium perfringens?( FB2 2014 )
A) Lack motility​
B) produce neurotoxin

produce neurotoxin

24

What is the most infection associated with Bacteroides fragilis?(FINAL 2014 )
A) Oro-dental abscesses
B) abscess formation
C) Lung abscesses

abscess formation

25

Which microorganism shows drumstick appearance under the microscope?(FINAL 2014 )
A) Clostridium botulinum
B) Clostridium perfringens
C) Clostridium tetani

Clostridium tetani