More 48++ Diplococcus Gram Negatif. A diplococcus (plural diplococci) is a round bacterium (a coccus) that typically occurs in the form of two joined cells. Study 15 gram negative bacteria flashcards from jeff j. Moraxella catarrhalis, a gram negative diplococcus, is an. Because of their thick capsule they are not phagocytosed. Diplococcus Gram Negatif - Gonorrhea The bacterial we will look at in this video are n.