Trichostrongylus colubriformis infection of guinea pigs: genetic basis for variation in susceptibility to infection among outbred animals.

Two lines of guinea-pigs, whose susceptibilities to infection with the parasitic nematode Trichostrongylus colubriformis differ significantly, have been established. This difference is probably based on genetically determined differences between the ability of members of each line to bring about immune expulsion of the parasite.