title: Asparenomycins A, B and C, new carbapenem antibiotics. IV. Antibacterial activity.
abstract: Asparenomycins (ASM) A, B and C, new members of the carbapenem family of antibiotics, are broad spectrum antibiotics with activity against Gram-positive and Gram-negative bacteria. ASM A was bactericidal to both aerobic and anaerobic bacteria, although morphological alterations of ASM A exposed cells differed significantly between Escherichia coli and Bacteroides fragilis; with the former ovoidal forms were produced while with the latter elongated forms were seen. Synergistic activities were observed with a combination of ASM A and ampicillin (ABPC) against various ABPC-resistant bacteria presumably as a result of the inhibition by ASM A of beta-lactamases. ASM A showed relatively weak therapeutic activity against E. coli infected mice, because of instability in body fluids, a common property of the carbapenem family of antibiotics.
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000097:blood / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D001424:Bacterial Infections / Q000188:drug therapy*; D001826:Body Fluids / Q000032:analysis; D004347:Drug Interactions; D004352:Drug Resistance, Microbial; D004355:Drug Stability; D005260:Female; D051379:Mice; D008813:Mice, Inbred ICR; D008826:Microbial Sensitivity Tests
chemical_list: D000900:Anti-Bacterial Agents