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  • Title: Isolation and identification of intestinal steroid-desulfating bacteria from rats and humans.
    Author: Van Eldere J, Robben J, De Pauw G, Merckx R, Eyssen H.
    Journal: Appl Environ Microbiol; 1988 Aug; 54(8):2112-7. PubMed ID: 3178214.
    Abstract:
    We isolated 12 strictly anaerobic steroid-3-sulfate-desulfating strains from the intestinal floras of rats and humans. Two strains (S1 and S2) of the same atypical Clostridium species and an atypical Lactobacillus strain (termed R9) were obtained from rats. The human isolates were identified as Eubacterium cylindroides (two strains, H1 and H2), Peptococcus niger (two strains, H4 and H89), and Clostridium clostridiiforme. We also isolated, from different human fecal samples, four strains of phenotypically similar asaccharolytic Bacteroides strains, H6.2a, H6.2b, H65, and H175. Aryl steroid sulfatase activity for estrogen sulfates was present in all isolates. Alkyl steroid sulfatase activity for both 3 alpha- and 3 beta-sulfates was found only in P. niger H4. The same P. niger strain and Clostridium strains S1 and S2 also possessed bile acid sulfatase activity.
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