Yeah you can have several no wonder some ppl are more sick. High protein? No it's usually the opposite since protein stimulate the immune response (via fuel, boost in numbers, repair, chemical weapons to name few). You want to see more worms in your BM this actually means your TH2 system (adaptive immunity) is working or something is! Roundworms? It vary on each specific type here. But in theory a host should operate somewhat normally however it gets very complex here since so many factors.