The role of endotoxin during typhoid fever and tularemia in man. IV. The integrity of the endotoxin tolerance mechanisms during infection

The Journal of Clinical Investigation
S E GreismanT E Woodward

Abstract

Volunteers infected with Salmonella typhosa develop a remarkable hyperreactivity to the pyrogenic and subjective toxic activities of homologous (S. typhos) and heterologous (Pseudomonas) endotoxins. The present studies quantitate this augmented reactivity and demonstrate by three differing approaches that significant tolerance to these endotoxins can be readily induced within the framework of the hyperreactive state. Thus, (a) tolerance induced before illness by repeated daily intravenous injections of the endotoxins remained demonstrable during overt illness, (b) daily intravenous injections of the endotoxins begun during overt illness evoked progressively increasing tolerance, and (c) continuous intravenous infusions of S. typhosa endotoxin during illness rapidly induced a pyrogenic refractory state. Despite unequivocal activation of the endotoxin tolerance mechanisms by any of the above methods, the febrile and toxic course of typhoid fever proceeded unabated. Similarly, in other volunteers with Pasteurella tularensis infection, continuous intravenous infusions of S. typhosa endotoxin evoked initial hyperreactive febrile and subjective toxic responses followed by rapid appearance of a pyrogenic refractory state without modif...Continue Reading

References

Jul 1, 1963·The Journal of Clinical Investigation·S E GREISMANT E WOODWARD
Sep 1, 1964·The Journal of Clinical Investigation·S E GREISMANT E WOODWARD
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Jun 1, 1965·The Journal of Experimental Medicine·S E GREISMAN, W E WOODWARD

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