Hello, these are some frequencies for hookworms Parasites_hookworm - 6.8, 440, 2008, 6436, 5868
I use a varigamma fzg, there not cheap but a wise investment. The url above shows over 3000 disease, also fun frequencies towards the bottom of the list.
Ive never seen a programable generator for $150. these usually are over $400.
The varizapper is $586. ouch, but worth it! http://www.drclark.com