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Isolation and properties of metronidazole-resistant mutants of clostridium-perfringens
journal contributionposted on 2023-05-17, 08:19 authored by Sindar, P, Margaret BritzMargaret Britz, Wilkinson, RG
Clostridium perfringens strains resistant to metronidazole and tinidazole were isolated from the sensitive parent strain CM288 after mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine. Strain CM288 was already resistant to rifampicin and nalidixic acid; these genetic markers helped to confirm the identity of mutants. All mutants showed similar characteristics: they grew more slowly than the parent strain and failed to reach the same maximum turbidity; uptake of metronidazole and tinidazole from culture fluids was slow and end products of glucose metabolism were different from those of the parent. Pyruvate dehydrogenase activity was not detected in broken cell preparations of the mutant strains although this enzyme was readily detected in the parent strain. Changes in end products of glucose metabolism were consistent with the absence of pyruvate dehydrogenase activity because pyruvate was accumulated during growth and lactate levels were higher whereas acetate, CO 2 and ethanol levels were diminished.
Publication titleJournal of Medical Microbiology
Department/SchoolCollege Office - College of Sciences and Engineering
PublisherSoc General Microbiology
Place of publicationMarlborough House, Basingstoke Rd, Spencers Woods, Reading, England, Berks, Rg7 1Ag