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  • Title: Antibacterial activity and beta-lactamase stability of MDL 19,592, an oral cephalosporin.
    Author: Yu KW, Neu HC.
    Journal: Diagn Microbiol Infect Dis; 1989; 12(5):441-3. PubMed ID: 2515027.
    Abstract:
    We compared the in vitro activity and beta-lactamase stability of MDL 19,592, an orally absorbed cephalosporin, with that of cephalexin and cefaclor. It inhabited Staphylococcus aureus at less than or equal to 4 micrograms/ml, Streptococcus pyogenes at 0.25 microgram/ml, sero groups B, C and G streptococci at 1 microgram/ml, and Streptococcus pneumoniae at 2 micrograms/ml. It was slightly more active than cefaclor and cephalexin. MDL 19,592 did not significantly inhibit Enterobacteriaceae, enterococci, Listeria monocytogenes, Pseudomonas aeruginosa, and Acinetobacter spp. strains (MIC greater than or equal to 32 micrograms/ml). MDL 19,592 was not hydrolyzed by the plasmid beta-lactamases TEM-1 and SHV-1 of Klebsiella but was hydrolyzed by the TEM-3, Staphylococcus aureus beta-lactamase, and the chromosomal-mediated Enterobacter cloacae P99 enzymes.
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