I had the same symptoms on my stomach. Tried Antibiotics (amoxciline and broad spectrum variants), creams galore!, coloidal silver, hot castor oil packs, magnesium chloride....and the list goes on.
Then I tried Black Salve (Amazon Black Salve), Wow! This ate out the parasite infected skin areas over a few days of excruciating pain (with pain killers). Left holes in me where they lived and I think they are all gone now, still healing!