Why choose? Why not make the "unconnected" ones be named Pustules (the less threatening name) and "connected" ones be Cysts? That way you don't have to name them connected and unconnected. Kinda immersion breaking plus being such an awkward long word to use in a fast pace FPS/RTS.
p.s. Cant't wait to be on team "Lancer", specializing in eradicating this threat muhaha