1,721,105 research outputs found

    In vitro activities of ramoplanin and four glycopeptide antibiotics against clinical isolates od Clostridium difficile

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    Seventy strains of Clostridium difficile, all isolated from symptomatic patients, were found to be uniformly susceptible to ramoplanin, a new glycolipodepsipeptide antibiotic, and to four glycopeptides (vancomycin, teicoplanin, and two semisynthetic teicoplanin derivatives). Ramoplanin is recommended for further evaluation in the treatment of C. difficile-associated disease

    Cloning and expression of the Staphylococcus aureus glucosaminidase in Escherichia coli.

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    A fragment of Staphylococcus aureus DNA encoding the glucosaminidase determinant was cloned in Escherichia coli by inserting the Sau3A genomic fragments in the BamHI site of the plasmid vector pBR322. One clone selected on the basis of its lytic activity was shown to contain a hybrid plasmid (pEU213) carrying a 4.7 kb insert of S. aureus DNA. Lytic activity was tested using different assays, and the enzyme production was confirmed by immunological reactions. An appreciable reduction of lytic activity was noted after few subcultures. The E. coli carrying pEU213 had a slower growth rate and increased autolytic activity compared to the parental strain. The possible reasons for this behavior are discussed
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