Arbitrarily primed polymerase chain reaction (AP-PCR) was used to characterize LegioneUa pneumophila serogroup 1. Cells from a single colony could be subtyped by AP-PCR within a few hours. The discrimination between strains of L. pneumophila serogroup 1 by AP-PCR was equivalent to that by monoclonal antibody analysis and ribotyping. Four strains representing the monoclonal antibody pattern most frequently associated
Agar dilution minimum inhibitory concentration (MIC) methodology, according to NCCLS guidelines, was used to test the activity of three glycopeptides (LY 333328 [LY], vancomycin [VAN], and teicoplanin [TEI]), four fluoroquinolones (trovafloxacin [TRO], BAY 12-8039 [BAY], ciprofloxacin [CIP], and ofloxacin [OFL]), five macrolide-lincosamide-streptogramin antibiotics (erythromycin [ERY], azithromycin [AZI], miocamycin [MOM], clindamycin CLN], and quinupristin-dalfopristin [SYN] against 126 Streptococcus pneumoniae strains, isolated in Lozano Blesa Hospital of Zaragoza (Spain). MIC50/MIC90 (microg/ml) values for penicillin-susceptible (PS), penicillin-intermediate (PI) and penicillin-resistant (PR) strains show an excellent antipneumococcal activity of LY 333326--a new glycopeptide, for the fluoroquinolones trovafloxacin and moxifloxacin [BAY 12-8039], and for quinupristin/dalfopristin, regardless of the resistance phenotype of the strains.
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