From helminth + -o- + -phobia.
helminthophobia (uncountable)
- A morbid fear of parasitic worms.
1987, Lars L. Gustafsson, Björn Beermann, Yakoub Aden Abdi, Handbook of drugs for tropical parasitic infections, page 52:In patients misusing the drug because of helminthophobia, the risk of severe side effects has to be considered.