I had pseudo in show up on a bronch about 3 years post-tx. I had pneumonia at the time, so they said it was an acute infection. I was on Colistin and some IV's for about a month and that took care of it. I do continue to battle with it in my sinuses and go on IV's periodically for that.
Hopefully since it's low colonization, it will go away with some Colistin. I wouldn't worry about it too much. Pseudo is an opportunistic infection and you have healthy lungs now.
Congrats on your tx btw.