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Microbiology

Study Pack

Set 16 Aerobic Gram Positive Bacilli

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Question 1

(Multiple Choice)

Free
What is the colony morphology of A. haemolyticum on SBA?

A) A narrow zone of β\beta -hemolysis and a black opaque dot is seen when the colony is scraped away.
B) No hemolysis, with pitting around the edges of the colony.
C) α\alpha -Hemolysis, with a central black opaque dot in the colony.
D) A wide zone of β\beta -hemolysis and a large, yellow, mucoid colony.

Answer

Question 2

(Multiple Choice)

Free
What is the major virulence factor associated with Corynebacterium diphtheriae?

A) Trypsin
B) Diphtheria toxin
C) Diphtheria bacteriophage
D) Hyaluronidase

Answer

Question 3

(Multiple Choice)

Free
What media does Corynebacterium diphtheriae grow on?

A) Sheep blood agar (SBA)
B) Loeffler
C) Cystine-tellurite blood
D) All of the above

Answer