If you can actually find bed bugs then it isn't scabies it's a misdiagnoses. Doctor's aren't perfect. Those little buggers are making a huge comeback in the states because the poison that got rid of them is illegal now. Saw a documentary on it. So they are rampant. Coming over from immigrants at an alarming rate then people are transfering them to each other. It was a very interesting documentary. I know it was on one of the discovery channels.
My husband works for a hotel and everytime a customer leaves the cleaning staff has to inspect the beds throughly. If they find them they literally throw the mattress out and get a exterminator in there ASAP. They can travel in purses, suitcases, on people.. etc. So usually you can bring them home on your person and then your house will get them. I'd inspect all of your beds but if you haven't seen ANY bites yet you might be in the clear but I wouldn't bring anything in their house. Not even a purse and I'd inspect my person before I left.
They really need to get a GOOD extermintor in there and the documentary said that usually all beds and furniture (fabric type) has to be tossed. :(