Wednesday, 24 June 2015

Clostridium

Clostridium

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The most toxic exotoxin is ___________.

a. tetanus toxin
b. diphtheria toxin
c. botulinum toxin
d. cholera toxin

Which of the following species of Clostridium is predominantly sacchrolytic?

a. C septicum
b. C perfringens
c. C novyi
d. All of these

Clostridium botulinum food poisoning is due to  ___________.

a. invasion of bacteria in the intestine
b. preformed toxin
c. both (a) and (b)
d. none of the above

Drumstick appearance is characteristic of  ___________.

a. C tetanomorphum
b. C tetani
c. C sphenoides
d. all of these

Which of the following types of Clostridium perfringens produces alpha toxin most abundantly?

a. Type A
b. Type B
c. Type C
d. Type D

Which of the following is predominantly proteolytic?

a. C. sporogenes
b. C. histolyticum
c. Both (a) and (b)
d. C. speticum

Nagler's reaction is useful for the identification of  ___________.

a. C tetani
b. C perfringens
c. C botulinum
d. C difficile

Typical drumstick appearance of bacilli is generally seen in  ___________.

a. C perfringens
b. C botulinum
c. C tetani
d. C histolyticum

Which of the following(s) is/are obligate anaeorbes?

a. C septicum
b. C novyi
c. C tetani
d. All of these

Stormy clot reaction is useful in identification of  ___________.

a. C tetani
b. C botulinum
c. C perfringens
d. C difficile

Food poisoning strains of Clostridium perfringens belong to  ___________.

a. type A
b. type B
c. type C
d. type D

Reddening of meat in cooked meat broth is produced by ___________.

a. C tetani
b. C histolyticum
c. Clostridium perfringens
d. C sporogenes

Blackening of meat in cooked meat broth is through  ___________.

a. C histolyticum
b. C perfringens
c. C tetani
d. all of these

Which of the following properties are the characteristics of tetanospasmin?

a. It is a heat-labile protein
b. It is a neurotoxin
c. It can be toxoided
d. All of these

Types of exotoxin, most commonly associated with botulism in man, is/are?

a. Type A
b. Type B
c. Type E
d. All of these
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