"Don't swim in Congo River," is the only information on the
post that OynxCougar just sent along. I don't like to run these sort of blind items, where we don't know the full story. But it doesn't look like a hoax in any case.
Just to be sure, I have now ruled out swimming in even a swimming pool, in any of the countries where this river flows, as well as all natural bodies of water that are connected to the Congo in any way.