What Organism Displays Babès-Ernst Granules on a Gram Stain

Question

What organism displays Babès-Ernst granules on a Gram stain?
A) Listeria monocytogenes
B) Erysipelothrix rhusiopathiae
C) Rhodococcus equi
D) Corynebacterium diphtheriae

Accepted Answer

Babès-Ernst granules are metachromatic granules that can be observed in Corynebacterium diphtheriae when stained with certain dyes like methylene blue. These granules are indicative of the organism's ability to store phosphate reserves.