Enterobius vermicularis (pinworms) may cause a
noisome perianal itch, but secondary complications
including dermatitis, bacterial infections, and local
abscesses can develop. Treatment is a single dose of
mebendazole.
Trichinella spiralis, which is acquired
by eating undercooked pork, may cause a diffuse
rash, nail bed splinter hemorrhages, and a subtle but
persistent periorbital edema (trichinosis).