Hypotension (Shock) in Dogs Produced by Escherichia coli Endotoxin

Intravenous injection of endotoxin from Escherichia coli in dogs is characterized by an immediate and precipitous decline in blood pressure with a simultaneous elevation of portal vein pressure. This reaction is abolished by hepatectomy or exclusion of the liver from the circulation and is believed due to trapping of blood in the liver. The reactions observed suggest that the profound biological effects of endotoxin are at least partially the result of anaphylaxis. The lethal effects of endotoxin are enhanced by removal of the liver.