Ponders, no, Nappisan destroys the elastic / waterproofing in modern cloth nappies. All ours recommend not to soak them (even in just water) before washing. In fact, most nappy manufacturers recommend not using bleach and washing at 40 degrees most of the time. 
yy to what Teetik says about us all having some of those bacteria on us. The infection my DS has on his face is with a bug that we all carry small amounts of, but he often gets a heavy growth of it. When it gets into the eczema on his face it makes his whole face crack and weep pus. :( DH was tested for it and also had a heavy growth of staph. in his nose, but with no ill effects at all for him.
The dermatologist was concerned because it keeps getting re-infected again so if I wash everything at 60 that'll at least rule out one source of re-infection.
That's interesting about the eczema link, Ponders. All our info from the dermatologist says to use non-bio. I thought that was because a small proportion of people are allergic to the enzymes in bio, though.