Termites, How To Check If They Are Living In Cat Tree?

[terestrife]

We've had termites for years and could never afford to treat for them. My brother doesnt take it very seriosuly says they are harmless, which is obviously not true. Anyway, i treated the home with Home defense bug spray, and it seems to have killed all the swarmers. I sealed the hole where they were coming from, and poured diatomaceous earth in the hole.
they seemed to go away, but found two swarmers today, coming from her scratcher. i took it outside and termite poop came out. so i tossed it.

i found a few dead ones in her cat tree. can her tree be saved? how can i make sure they are all dead in her tree?
i want to buy again her scratching post, because she loves it so much. how can i protect it from termites while also keeping it safe for her to use?

 

[kashmir64]

Believe it or not, catnip has shown promise for termite control.

 

[basscat]

Termites can't live if they can't get to the ground (dirt/soil).