Effect of endotoxin on resistance in the early period of ontogenesis.
D000818:Animals; D000917:Antibody Formation; D000941:Antigens / Q000494:pharmacology*; D001419:Bacteria; D002642:Chick Embryo / Q000276:immunology*; D004731:Endotoxins / Q000494:pharmacology*
D000941:Antigens; D004731:Endotoxins