Hey Michael!
Yes, it is definitely possible that these plants and the honey have antibiotic properties. While most antibiotics are derived from soil (this article), plants have gotten quite a bit of attention lately. Tumeric I know has anti-inflammatory effects (but I will have to look into this more and see what people have learned about this). So give me some time to do research and I will write a post about it. Does that sound good?
I heard about this guy before, he has an interesting story. I would also have to do more research for this. Here is the deal: many diseases do not really need the attention they get. So I definitely see potential for alternative approaches to healing. Just look at upper respiratory tract infections. They do not require any treatment in most cases. However, if you have non-medical treatments for the symptoms, they may help. I inhale from a waterbath with salt and etheric oils to relieve pressure.
I hope this answer is satisfactory. If you give me some time I can do some more research and then let you know what I found.
Cheers!