Last month I was medically diagnosed positive by blood ELISA for Gnathostomiasis (after having specific blood tests done for practically every other worm in existence!). This test was ordered by my ID doctor after she spoke on the phone to a parasitologist in the London Hospital for Tropical Diseases, and my blood had to be sent to Bangkok to get this test done. So just goes to show that the system may (very slowly) eventually work for you too.
This would make sense as Gnathostomiasis shows both subcutaneous larva migrans and visceral larva migrans-like symptoms. It also happens to be the most motile of any human parasite and one that migrates faster than any other any has spikes near it's mouth allowing it to essentially burrow absolutely anywhere it wants in the body.
I've taken oodles more Albendazole and Ivermectin and have slowly improved. Just finished anothersolid 3 week Albendazole course and came out in a lot more boils (a good sign), and definitely improved more, but still not rid of all. I seem to have been infested with hundreds and hundreds of these things. I guess time will tell when I get rid of them completely...