Eggs that are produced are passed with the feces of the horse. They remain in these moist and warm conditions where they soon hatch. It takes about two weeks for the larvae to reach the infective stage.
When ingested, the larvae penetrate the lining of the intestines.
They eventually migrate to the arteries where they burrow along the walls. This stage can occur for up to three months.
During this time, they become “pre-adults”, ready to travel back to the intestines, where they form nodules in the intestinal arteries.
After feeding for about 8 weeks, they reach sexual maturity and begin producing eggs, all the while sucking blood from the horse.
A Rendezvous in Space and Time