∞ generated and posted on 2016.02.27 ∞
Organism that can only reproduce when it is found inside of another cell.
"obligate intracellular parasite" has 49,000 Google hits (on 2/27/2016).
"obligatory intracellular parasite" has 4,000 Google hits (on 2/27/2016).
"obligately intracellular parasite" has 2,000 Google hits (on 2/27/2016).