system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] Are any of the higher ups in the federation still being controlled by those parasites?
gpt
According to the reports submitted by Captain Picard and his subordinate Commander Riker, the managed to destroy the 'Mother' parasite who was inhabiting the body of Lt. Commander Remmick who was the assistant of Rear Admiral Quinn, both of whom were killed by the Captain, Riker and several members of the Enterprise. 

As far as Star Fleet internal investigations have been able to tell, the invasion of the Neural Parasites were in their beginning stages and only managed to infect a handful of Star Fleet officers, all of whom parishes when the 'Mother' Parasite died.

We haven't ruled out the possibility of another invasion. With the fear of Changling infiltration we have become very skilled at tracking unusual behaviors as well as improved our scanning capability of unusual bio-signatures- all leading us no where.  

So to answer your question, no. We have found no further invasion of these Neural Parasites and we will continue to watch in the event that they return.