Pathologists go through medical and residency training to diagnose samples under microscope. There are no podiatrist that does this because we send our samples out for it to be done. However, Dr Warren Joseph is a dpm with fellowship training in infectious diseases (only 2 of these exist in the world according to him), hes written books, articles, and is an editor of japma, if u google him u will find his blog which has excellent articles. He does primarily wound care of the lower extremity which is where the moneys at.