dust particles, iluminated by the camera's flash and then captured by a digital camera are not ghosts.
It's funny how the 'ghost hunting community' thinks these so called 'orbs' are ghosts. And even funnier how they disregard the fact that they only started to appear once digital camera's were around.
I guess certain ghosts waited for a technological breakthrough before they chose to show themselves.
So don't get too excited, there is no paranormal content in that picture at all.
Fred