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. 1974 Aug;10(2):287–292. doi: 10.1128/iai.10.2.287-292.1974

Prevention of the Generalized Shwartzman Reaction and Endotoxin Lethality by Polymyxin B Localized in Tissues

William A Craig 1, James H Turner 1, Calvin M Kunin 1
PMCID: PMC414993  PMID: 4369040

Abstract

Pretreatment with multiple doses of polymyxin B and colistimethate was evaluated as to its ability to sequester sufficient antibiotic in tissues to neutralize the effects of endotoxin in three animal models. Animals were challenged with endotoxin 24, 48, or 72 h after the last dose of antibiotic when there was minimal or not detectable drug in serum. Pretreatment with polymyxin B was successful in preventing the generalized Shwartzman reaction in rabbits and reducing endotoxin lethality in mice; however, large doses (20 mg per kg per day for 2 or 4 days) were required. Prolongation by more than 24 h of the interval between the last dose of polymyxin B and endotoxin challenge resulted in reduction or loss of protection. Dogs were unable to tolerate the high polymyxin B dosage which was protective in the mouse and rabbit. Lower, nontoxic doses of polymyxin B in dogs did not prevent endotoxin shock and lethality, even when challenged as soon as 1 h after the last dose. Pretreatment with colistimethate was ineffective in all three animal models.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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