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  • Title: Chemical and biological properties of a phenol-water extract from Leptospira interrogans. Evidence for the absence of lipopolysaccharide.
    Author: Cinco M, Banfi E, Giani M, Gundelach ML, Galanos C.
    Journal: Infection; 1988; 16(4):238-41. PubMed ID: 3182088.
    Abstract:
    Leptospira interrogans, serovar copenhageni was extracted by the phenol-water method and the resulting preparation examined for chemical composition and endotoxic activity. Chemical analysis revealed that a number of sugars were present, however, the amount of lipid content was very low. Further, the preparation was devoid of characteristic endotoxic properties, like lethal toxicity, pyrogenicity and the property to induce the local Shwartzman reaction. The extract, however, was active in the limulus lysate gelation test and in the induction of monocyte activation. It is concluded that the leptospira preparation is devoid of endotoxin properties, both from the chemical and from the biological point of view.
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