Jesus. I've just finished reading Infection by Scott Sigler. Ouch. It's a good book, but my god, it is DISGUSTING. Bascially, one of the main characters gets infected by spore alien thingys - seven of them - and he decides, over the course of the novel, to remove them - with forks, flaming towels etc. Really, really grim, and I hope they never make a movie of it. Turned my stomach.
Apparently it's the first of a trilogy, which is interesting, as to be honest, I thought it was going to be more global - like Cell, so hopefully it can expand more in the future books, and it'd be a great twist to have the infected character from this novel be a main part of the next two.