RT Journal Article SR Electronic(1) A1 Tompkins, D. S. A1 Millar, M. R. A1 Heritage, J. A1 West, A. P.YR 1987 T1 β-Lactamase Production by Intestinal Spirochaetes JF Microbiology, VO 133 IS 3 SP 761 OP 765 DO https://doi.org/10.1099/00221287-133-3-761 PB Microbiology Society, SN 1465-2080, AB β-Lactamase production was demonstrated in four of nineteen strains of intestinal spirochaetes isolated from human subjects. The enzyme was preferentially active against penicillins and was inhibited by clavulanic acid; it was membrane bound and non-inducible. No plasmids were detected in the intestinal spirochaetes and the β-lactamase-production characteristic was not transferable to non-producing strains., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-133-3-761