My one caution is that it's a mistake to assume that concentrated plant products are better for you than prescription pharmaceuticals. They may in some cases work well for you, and in some cases may have fewer troublesome side effects. In other cases the opposite will turn out to be true. What you can usually be sure of with supplements is that they have had little or no scientific testing for safety or efficacy, and the doses of the active ingredient(s) may vary enormously between batches, varying (for example) by season of harvest.
If it has antibiotic properties then it's an antibiotic, whether or not it requires a prescription or FDA approval or any attention to the particular bacteria it acts on.