Yes your feeder insects can carry both forms of parasites, and others, If you get them from a supplier that has an infestation, then your dragons get it from the feeders they've eaten from the supplier. Getting the cheapest bugs is not alwasy the safest. And, coccidia, by the way is common in dragons, but the counts are usually very low and don't cause a problem. But, if the dragon is exposed to more by means of infected bugs, then those counts can increase dramatically. Also, a dragon who is injured, weak or ill will have dramatic increase in the coccidia counts as well. Coccidea is very, very hard to get under control. Tom's suggestion for the amonia mix one week and the bleach mix the next will definately help kill of remaining parasites present in the viv. Be sure your using paper towel or newspaper for substrate while you are treating and change it out every time there is poo and at least once daily. Good luck, I hope things get better for you soon.