Which of the Following is an Obligate Intracellular Parasite

Question

Which of the following is an obligate intracellular parasite?
A)M.luteus
B)S.pyogenes
C)Rickettsia rickettsi
D)Pseudomonas spp.

Accepted Answer

Rickettsia rickettsi is an obligate intracellular parasite, meaning it requires a host cell to replicate and survive. M.luteus, S.pyogenes, and Pseudomonas spp. are all bacteria that can survive and replicate outside of a host cell.