Journal of Antimicrobial Chemotherapy (1999) 44, 179-192
© 1999 The British Society for Antimicrobial Chemotherapy
In-vitro and in-vivo antibacterial activity of BI 397, a new semi-synthetic glycopeptide antibiotic
Biosearch Italia S.p.A., Via R. Lepetit, 34-21040 Gerenzano (Varese), Italy
BI 397 (formerly A-A-1) is a semisynthetic derivative of the teicoplanin-like glycopeptide A40926. It was more active in vitro against staphylococci (including some teicoplanin-resistant strains) than teicoplanin and vancomycin. Against streptococci (including penicillin-resistant strains) BI 397 has activity comparable with that of teicoplanin and better than vancomycin. BI 397, when administered to rats by the iv route, gives high and long lasting blood levels. It shows excellent activity in models of acute septicaemia in immunocompetent and neutropenic mice. In a rat staphylococcal endocarditis model it is as effective as teicoplanin and vancomycin at reducing bacterial loads in the heart, but at lower dosages and with a reduced number of daily treatments compared with the two glycopeptide controls. BI 397 is highly efficacious in clearing penicillin-susceptible and -resistant pneumococci from lungs of immunocompetent and neutropenic rats. The data from these studies show that BI 397 combines an excellent in-vitro antibacterial activity with favourable pharmacokinetic behaviour resulting in potent in-vivo activity.
* Corresponding author. Tel: +39-2-96474-243; Fax: +39-2-96474-238; E-mail: gcandiani{at}biosearch.it
Present address. Hoechst Marion Roussel, 102, Route de Noisy,
F-93235 Romainville Cedex, France.
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