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J Bacteriol. 1963 May; 85(5): 1088-1093
Copyright © 1963, The Williams & Wilkins Company. All Rights Reserved.

ENDOTOXIN-INDUCED TOLERANCE TO TOXIC MANIFESTATIONS OF CANDIDA ALBICANS

National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland

ABSTRACT

HASENCLEVER, H. F. (National Institutes of Health, Bethesda, Md.) AND WILLIAM O. MITCHELL. Endotoxin-induced tolerance to toxic manifestations of Candida albicans. J. Bacteriol. 85:1088–1093. 1963.—Mice exposed to 425 r total body irradiation failed to become tolerant to Candida albicans toxicity after injection with lipopolysaccharide. Mice injected with lipopolysaccharide and then X-rayed did not demonstrate the tolerant state. An injection of thorium dioxide in mice that had previously received tolerance-inducing amounts of lipopolysaccharide rendered them as susceptible to acute C. albicans toxicity as control mice. A bimodal manifestation of tolerance was noted. Groups of mice given single injections of lipopolysaccharide at 6 or 1 days before challenge demonstrated high levels of tolerance, whereas the tolerance in mice given a single dose at 3 days was negligible. The bimodal effect was not observed in tolerant mice challenged with lipopolysaccharide. Injections of viable or nonviable pathogenic fungi known to produce tolerance to the toxicity of C. albicans in recipient mice did not produce tolerance to lipopolysaccharide. Serum from mice injected with lipopolysaccharide showed in vitro inhibitory activity for C. albicans.