larva migrans often presents itself as skin dermatitis. It
appears as an irregularly shaped red line, either semi-circular
or squiggly. The entrance of the organism, which is a very
small worm, will often times cause a papule or a blister to
form at the site. It is very commonly seen on the soles of
The hook worm is the most common species of cutaneous larva
migrans, and is often found in the stool of dogs and cats,
unlike the round worm, which is found in the stool of raccoons,
more commonly in the Midwest. Hook worm rashes often itch.
If untreated, they usually go away in 2-3 weeks, and are not
a problem. In severe cases, in the acute phase, the adult
worm can proceed to the intestine, and may cause colic or
epigastric pain, flatulence, diarrhea and weight loss. The
majority of infections is seen in the southeastern United
States, and is commonly seen on beaches where individuals
are walking their dogs.
The rash that you see here is a common presentation of cutaneous
larva migrans. This young gentleman was lying in a field frequented
by people walking their dogs and cats. He had one lesion on
his back and one on his arm.
Healthcare Treatment and Prevention
Thiabendazole is the most commonly used
drug. It is 25 mg./kg. twice
daily for 2 days, and it does result in about a 90% cure rate.
You can also use Albendazole, 400 mg. daily for 3 days, which
is also very effective.