Anaerobes

Question 1

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

Answer 1

C) produces double zone hemolysis on blood agar

Question 2

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

Answer 2

inhibits acetylcholine release

Question 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

Answer 3

A) Anaerobe streptococci

Question 4

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

Answer 4

A) Canned food

Question 5

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

Answer 5

Porphyromonas gingivalis

Question 6

What is a characteristic of Anaerobes?

Answer 6

Low redox –Eh

Question 7

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

Answer 7

A) Block acetylcholine transmission

Question 8

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

Answer 8

A) Clostridium perfringens

Question 9

Which of the following organisms produce endospores?

Answer 9

Clostridium botulinum

Question 10

What enzyme do anaerobic bacteria lack?

Answer 10

Superoxide dismutase

Question 11

What disease is caused by Clostridium difficile?

Answer 11

Pseudomembranous colitis

Question 12

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

Answer 12

Causes a mixed infection following abdominal surgery

Question 13

Which anaerobes causes intraabdominal abscess after surgery ?

Answer 13

Bacteriodes fragilis

Question 14

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

Answer 14

Clostridium perfringens

Question 15

Which of the following organisms produce endospores?

Answer 15

Clostridium botulinum

Question 16

What enzyme do anaerobic bacteria lack?

Answer 16

Superoxide dismutase

Question 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?

Answer 17

Bacillus Cereus

Question 18

What Enzyme do anaerobic bacteria lack?

Answer 18

Superoxide dismutase

Question 19

Which of the following forms endospores?(FB2 2013)

Answer 19

Clostridium botulinum

Question 20

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

Answer 20

Hospitilization in geriatric ward

Question 21

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

Answer 21

Clostridium tetani

Question 22

What enzyme do anaerobic bacteria lack?( FB2 2014 )

Answer 22

Superoxide dismutase

Question 23

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

Answer 23

produce neurotoxin

Question 24

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

Answer 24

abscess formation

Question 25

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

Answer 25

Clostridium tetani