It is unrealistic to expect any dwelling, whether it be hotel or hostel, to be free of bed bugs, especially if you're in a region with lots of international travelers. There is no effective insecticide for them, they can be impossible to see, and they don't need to eat for months.
Now, any decent hotel will be doing periodic checks for bedbugs around the box spring and headboard, and any other wooden furniture. But there will always exist a small chance that the last person to be in the room brought a couple and you will get them.
Good news is they don't transmit any disease, and if they bite you, it just itches for a few days and goes away.
