Trichostrongylus nematodes (roundworms) are intestinal (mainly) parasites of animals, primarily ruminant mammals, including domesticated mammals such as sheep, goats, and camels. Trichostrongylus colubriformis is commonly a parasite of sheep, but it is also among the handful of species that have been documented as sometimes infecting humans (Lattes 2011). Trichostrongylus species are found worldwide, but they are more common where livestock is raised. (Centers for Disease Control Parasites and Health website)
