title: Limulus amoebocyte lysate assay of endotoxin: a method for visual detection of the positive gel reaction.
abstract: In a Limulus amoebocyte lysate micro-test system, visual differentiation between positive and negative reactions was obtained by the addition of a small drop of fresh, defibrinated sheep blood to the reaction mixture. This method has greatly facilitated end-point identification in a series of dilutions of endotoxin.
mesh_terms: D000818:Animals; D001769:Blood; D004731:Endotoxins / Q000032:analysis*; D008033:Limulus Test; D012756:Sheep / Q000097:blood
chemical_list: D004731:Endotoxins