Some Observations on the Behaviour of Nippostrongylus brasiliensis in different kinds of Laboratory Animals

Abstract

(1) Rats and mice are specific hosts to N. brasiliensis. (2) The life span of the parasite may reach up to 100 days in the rat but is much shorter in other experimental animals. (3) Chickens do not become infected with this parasite. (4) It was found that the route of migration of this parasite inside the body to the lungs was via the lymph system and not via the blood in all experimental animals. (5) The larvae, after application to the skin, reach the lymph glands draining the site of infection, not before 12 hours ; and they reach the lungs at 18 hours after exposure to infection.