Heterologous helminth induced resistance to Ascaris suum in guinea pigs

The protection inducing capacity of Toxocara canis, Ancylostoma caninum, Haemonchus contortus, Caenorhabditis briggsae and Turbatrix aceti given via the mesenteric vein to a challenge infection with Ascaris suum was evaluated. Embryonated eggs and second stage larvae of T. canis and infective larvae of A. caninum were able to induce a statistically significant level of protective immunity, while the other non-related helminths were unable to protect against a challenge infection.