That's well and good - but those are not clinical trials. To my knowledge, there hasn't been a solid body of clinical trials (that is, using humans) championing the efficacy of garlic in fighting bacterial infections. I may be wrong. Maybe this is a gap in my knowledge. But I would not put my faith in garlic, especially against something formidable, like MRSA.
As far as garlic/acillin, there are a lot of preparations available that are enteric coated to protect the active cons uents from being degenerated by stomach acid.