- In 2154, the Xindi-Reptilians used a neural parasitic species to brainwash Hoshi Sato. (ENT: "Countdown")
- In 2267, the USS Enterprise encountered a flying parasite at the Deneva colony. (TOS: "Operation -- Annihilate!")
- In 2364, the USS Enterprise-D encountered a species of parasitic beings attempting to infiltrate Starfleet Command. (TNG: "Conspiracy")
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