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The injection of four-to nine-week-old fowls with Escherichia coli O111:B4 endotoxin (0-1 and 1-0 mg/kg) produced a two to eight fold rise in the histaminase activity of the plasma 24 h afterwards. In some cases this increase was still detectable after 48 h. This activity was strongly correlated with the p-phenylenediamine oxidase activity of(More)
Groups of adults which were selected for low and high (normal) TMA oxidase activities produced chickens with a predominance of the same character showing that capacity for synthesizing the enzyme is strongly inherited. The low and high strains became homogenous in generations 2 and 3, respectively, demonstrating that the genetic factor that impairs the(More)