Abstract
We compared two of the East Lansing Regional Poultry Research Laboratory inbred chicken lines for immune responses to four antigens injected in Freund's complete adjuvant, and to the chemical oxazolone as a contact sensitizer. Line EL6 chickens gave higher delayed hypersensitivity responses than did EL7 birds to BSA, dodecanoic acid-conjugated BSA, and ferritin, as well as to oxazolone. Line EL6 gave the higher primary antibody responses to the first three of these antigens, but EL7 gave the higher responses to the hapten DNP. Since these lines are identical for theB major histocompatibility complex by serological and functional tests, these results imply the existence of differences in levels of immune responsiveness which are apparently non-MHC-associated.
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