Gram positive rods

Question 1

What is the Feature of Corynebacterium diphtheriae ?

Answer 1

non-spore forming, non-motile, aerobic , non-capsulated , Club-shaped joined at angles (V- and L-shaped) giving Chinese-letter appearance .

Question 2

What is the virulence factor of Corynebacterium diphtheriae ?

Answer 2

Diphtheria exotoxin

Question 3

What is the function of elongation factor 2 (EF-2) in the Corynebacterium diphtheriae ?

Answer 3

inhibition protein synthesis in all cells

Question 4

Bull neck appearance & Greyish white pseudomembrane on the tonsils , we see in the ?

Answer 4

Corynebacterium diphtheriae

Question 5

What is the stains that use in Corynebacterium diphtheriae ?

Answer 5

1- Polychrome methylene blue (granules are pink, the rest of the cell is blue)
2- Neisser Stain (granules are dark purple; the rest of the cell is yellowish brown)