I don't think Gareth and friends cut off Bob's leg to save him in any way. He was clearly dinner. The question for me, though, is if Bob was bit does that come into play with the Termites? Maybe they all start dropping like flies and only Gareth is left which forces him to try and weasel his way into the group.
I can see that story line coming, or that Bob suddenly turns at some opportune time to keep a termite from killing one of the "safe" characters who must survive.
If they play up the tainted meat angle, I wonder how that matters since everyone is already infected? If everyone already has it, how would eating someone with it make it worse?
Zombies are walking petri dishes of bacteria. Their bites kill people because they cause a nasty bacterial infection, not because they cause a zombie infection. That's my take anyway.
Possibly. But does a "normal" bacterial infection secondary to a bite kill you in a few hours. We may want to page Dr. Bramel but my instinct is that it takes some time and you'd have traditional symptoms as the infection becomes systematic.
If you say " it isn't normal bacteria, though", that's the trap. They are already infected with the abnormal pathogen, be it virus, bacteria, etc. So for the infection to be the killer, so that THEN the zombie bug can reanimate you, it had to be the normal, everyday bacteria that kill you via infection.
To be honest, I think it's an unresolved problem created by the initial creators who decided to deviate from the traditional zombie-bite-as-transmission-vector angle. Someone came up with the novel idea of everyone being infected as a great plot twist and they got their jollies off on the irony of the living survivors already being zombies that just hadn't got ripe yet...thus being the walking dead themselves. Problem is they didn't really think it through as far as what that would really mean. But at the same time they couldn't then abandon the whole zombie-bite-infects-you scenario because think about how that detail alone drives a zombie movie plot. So they've had to try and mesh the bite angle and the universal infection angle. But they don't logically mesh.
If I already have rabies, how does getting bit by a rabid dog or me eating the flesh of a rabid dog really hurt me in terms of having rabies? So then they have to depend on these contorted explanations to reconcile what is a glaring problem with the internal logic (stressing the "internal" part) of the storyline. You can't use "willing suspension of disbelief" as a panacea. If we suspend our disbelief to accept the basic premise that a zombie virus has been unleashed causing the dead to reanimate, that doesn't mean every other aspect of life as we know it suddenly stops following the rules. The laws of physics, for example, aren't altered. And neither should the laws of biochemistry.