In vivo evaluation of a dual-action antibacterial, Ro 23-9424, compared to cefotaxime and fleroxacin

Chemotherapy
G BeskidD D Keith

Abstract

The dual-action antibacterial R 23-9424 (desacetylcefotaxime linked to the quinolone fleroxacin) is a new antibacterial agent with excellent in vitro activity. It was evaluated for in vivo efficacy in comparison with the cephalosporin cefotaxime and the quinolone component, fleroxacin. Ro 23-9424 demonstrated significant activity against all strains tested in systemic infections, including those strains resistant in vivo to cefotaxime (Staphylococcus aureus 753, Serratia marcescens SM and Pseudomonas aeruginosa 8780) and fleroxacin (Streptococcus pneumoniae 6301 and Streptococcus pyogenes. In prophylactic studies, Ro 23-9424 compared favorably with fleroxacin against Escherichia coli and with cefotaxime against S. pyogenes, but Ro 23-9424 was considerably more active than cefotaxime against E. coli and more active than fleroxacin against S. pyogenes. In a murine pneumonia model, Ro 23-9424 was equivalent in activity to cefotaxime against S. pneumoniae and more active than cefotaxime against Klebsiella pneumoniae. Fleroxacin was inactive against S. pneumoniae and about 20-fold more active than Ro 23-9424 against K. pneumoniae. In a murine meningitis infection caused by S. pneumoniae, Ro 23-9424 was 3 times as active as cefotaxim...Continue Reading

Citations

Oct 1, 1993·Journal of Clinical Pharmacology·S M QadriB A Cunha
Dec 1, 1995·Journal of Pharmaceutical and Biomedical Analysis·B NickersonS Scypinski
Jul 1, 1994·International Journal of Antimicrobial Agents·R H RubinA J Fischman
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Mar 16, 2018·Clinical Microbiology Reviews·Ronald DomalaonFrank Schweizer

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