Passive transfer of immunity with serum in mice infected with Nematospiroides dubius: In vitro effect of immune serum on larval infectivity

Dobson C. and Cayzer C. J. R. 1982. Passive transfer of immunity with serum in mice infected with Nematospiroides dubius: in vitro effect of immune serum on larval infectivity. International Journal for Parasitology 12: 413-421. Incubation of Nematospiroides dubius larvae in serum in vitro induced 15% exsheathment after 3h. Larvae incubated in immune mouse serum at 37°C for 3h lost 20% of their infectivity for mice. Immune serum from donors given 1-7 concurrent or anthelmintic abbreviated infections all depressed larval infectivity to the same extent. Larvae incubated in immune sera were protected from the effects of passively transferred immune serum in mice following infection. The effects of incubation of larvae in immune serum were prolonged into the adult stages of the parasite and were seen as stunting of worms and a reduction in the male-female sex ratio of the parasites