Apxr--I beleive it is bacteria due to cultures from tongue scrapping samples. The same bacteria appears after repeated experiments. This bacteria is "stealth" and extremely fast moving. It does not stain using a wide variety of laboratory grade stains.
I also repond physiologically to penicillium from blue cheese, and from Grapefruit-Seed-Extract {anti-bacterial agent}
The bacteria, is hardy, in that it has limited response to oxidative agents. eg. H2O2.
The doctor is cautious, and awaiting more info. before prescribing meds.
I also base my Antibiotic thoughts on a powerful respose I once had to clindamycin.
Shroom