5.3.1.1 Aggregatibacter actinomycetemcomitans

Question 1

Formerly in the genus of?

Answer 1

Actinobacillus

Question 2

How many serotype does A. actinomycetemcomitans?

Answer 2

6 (a-f)

Question 3

Where can A. actinomycetemcomitans be found?

Answer 3

Blood
Lung
Tissue
Sinuses
Abscesses of the mouth and brains

Question 4

What is the virulence factor of A. actinomycetemcomitans?

Answer 4

Collagenase
Leukotoxin

Question 5

What are the disease cause by A. actinomycetemcomitans?

Answer 5

Destructive peridontitis
Subacute bacterial endocarditis

Question 6

Severe gum infection that causes gum to inflames and causes plaque or calculus that can lead to tartar

Answer 6

Destructive periodontitis

Question 7

What is the microscopical characteristics of A. actinomycetemcomitans?

Answer 7

Short bacilli in pairs/chains

Bipolar staining “Morse code appearance” (Star shaped)

Question 8

What is the colonial appearance of A. actinomycetemcomitans?

Answer 8

Pinpoint
Star shaped in the center of the colony

Question 9

How many hours will the pinpoint colony of A. actinomycetemcomitans last?

Answer 9

24 hrs

Question 10

When will the star shaped colony appear in A. actinomycetemcomitans?

Answer 10

48 hrs of incubation