The protective effect of endotoxin in X-irradiated mice |
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Authors: | I. Miler |
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Affiliation: | (1) Department of Immunology, Institute of Microbiology, Czechoslovak Academy of Sciences, Prague 4 |
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Abstract: | In mice X-irradiated with lethal dose (750 r) and mid-lethal dose (550 r) the protective effect of bacterial endotoxin isolated from strains ofSalmonella typhi has been found to be limited to a short period before irradiation and administration of endotoxin in repeated doses did not enhance protection. Application of endotoxin 4 days after X-rays resulted in increase of lethality of irradiation and earlier deaths of experimental animals were observed. Active intravenous and intraperitoneal immunization with endogenous strains ofEscherichia coli isolated from the intestinal flora of mice had a demonstrable protective effect when compared with passive immunization. |
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