tetracycline and telavancin

The activity of telavancin and comparators was assessed against a contemporary (2007 and 2008) global collection of 10,000 isolates of Staphylococcus aureus. Telavancin was very active against methicillin-susceptible and -resistant S. aureus (MSSA and MRSA, respectively; MIC(50/90) for both, 0.12/0.25 microg/ml; 100.0% susceptible). This agent was 2-, 4-, and 8-fold more potent than daptomycin (MIC(90), 0.5 microg/ml), vancomycin or quinupristin-dalfopristin (MIC(90), 1 microg/ml), and linezolid (MIC(90), 2 microg/ml) against MRSA, respectively. These data show a potent activity of telavancin tested against a current global collection of S. aureus.

Topics: Acetamides; Aminoglycosides; Anti-Bacterial Agents; Daptomycin; Drug Resistance, Bacterial; Humans; In Vitro Techniques; Linezolid; Lipoglycopeptides; Methicillin Resistance; Methicillin-Resistant Staphylococcus aureus; Microbial Sensitivity Tests; Oxazolidinones; Staphylococcal Infections; Staphylococcus aureus; Vancomycin; Virginiamycin

The in vitro activity of telavancin was tested against 743 predominantly antimicrobial-resistant, gram-positive isolates. Telavancin was highly active against methicillin-resistant staphylococci (MIC(90), 0.5 to 1 microg/ml), streptococci (all MICs, < or =0.12 microg/ml), and VanB-type enterococci (all MICs, < or =2 microg/ml). Time-kill studies demonstrated the potent bactericidal activity of telavancin.

Topics: Aminoglycosides; Anti-Bacterial Agents; Drug Resistance, Bacterial; Enterococcus; Gram-Positive Bacteria; Gram-Positive Bacterial Infections; Humans; In Vitro Techniques; Lipoglycopeptides; Methicillin Resistance; Microbial Sensitivity Tests; Staphylococcus; Streptococcus

The in vitro activity of telavancin was tested against 620 gram-positive isolates. For staphylococci, MICs at which 50 and 90% of isolates were inhibited (MIC(50) and MIC(90)) were both 0.25 microg/ml, irrespective of methicillin resistance. MIC(50) and MIC(90) were 0.25 and 0.5 microg/ml for vancomycin-susceptible enterococci and 1 and 2 microg/ml for vancomycin-resistant enterococci, respectively. Streptococcus pneumoniae, group A and B beta-hemolytic streptococci, and viridans streptococci were inhibited by < or =0.12 microg/ml.

Topics: Aminoglycosides; Anti-Bacterial Agents; Drug Resistance, Multiple, Bacterial; Europe; Gram-Positive Bacteria; Gram-Positive Bacterial Infections; Humans; Lipoglycopeptides; Methicillin Resistance; Microbial Sensitivity Tests; Staphylococcus aureus; Streptococcus agalactiae; Streptococcus pyogenes; Vancomycin Resistance; Viridans Streptococci