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In vitro activities of Ro 19-5247 and Ro 15-8074, new oral cephalosporins. 1986

R J Fass, and V L Helsel

The in vitro activities of two new oral cephalosporins, Ro 19-5247 and Ro 15-8074, were compared with the in vitro activities of cefuroxime, cefaclor, amoxicillin-clavulanate, trimethoprim-sulfamethoxazole (TMP-SMZ), and doxycycline against a variety of bacterial species. MIC50s (MICs required to inhibit 50% of strains) of Ro 19-5247 were less than or equal to 0.13 micrograms/ml for streptococci (except Streptococcus faecalis) and Haemophilus influenzae; 0.25 to 2 micrograms/ml for most strains of Enterobacteriaceae, Aeromonas hydrophila, Branhamella catarrhalis, and gram-positive anaerobic bacteria; and 1 to 8 micrograms/ml for methicillin-susceptible staphylococci. MIC50s of Ro 15-8074 were similar to those of Ro 19-5247, except that gram-positive aerobes and anaerobes were less susceptible. Both Ro 19-5247 and Ro 15-8074 had greater in vitro activity against strains of Enterobacteriaceae than did comparative beta-lactams and doxycycline; TMP-SMZ had the broadest spectrum of activity against these organisms. None of the cephalosporins were active against methicillin-resistant staphylococci, S. faecalis, most nonfermenters, or Bacteroides sp. Inoculum size variations affected MICs in a species-dependent manner for beta-lactams and unpredictably for TMP-SMZ but had little effect for doxycycline. Bactericidal activity was consistent with beta-lactams, inconsistent with TMP-SMZ, and uncommon with doxycycline.

UI MeSH Term Description Entries
D008826 Microbial Sensitivity Tests Any tests that demonstrate the relative efficacy of different chemotherapeutic agents against specific microorganisms (i.e., bacteria, fungi, viruses). Bacterial Sensitivity Tests,Drug Sensitivity Assay, Microbial,Minimum Inhibitory Concentration,Antibacterial Susceptibility Breakpoint Determination,Antibiogram,Antimicrobial Susceptibility Breakpoint Determination,Bacterial Sensitivity Test,Breakpoint Determination, Antibacterial Susceptibility,Breakpoint Determination, Antimicrobial Susceptibility,Fungal Drug Sensitivity Tests,Fungus Drug Sensitivity Tests,Sensitivity Test, Bacterial,Sensitivity Tests, Bacterial,Test, Bacterial Sensitivity,Tests, Bacterial Sensitivity,Viral Drug Sensitivity Tests,Virus Drug Sensitivity Tests,Antibiograms,Concentration, Minimum Inhibitory,Concentrations, Minimum Inhibitory,Inhibitory Concentration, Minimum,Inhibitory Concentrations, Minimum,Microbial Sensitivity Test,Minimum Inhibitory Concentrations,Sensitivity Test, Microbial,Sensitivity Tests, Microbial,Test, Microbial Sensitivity,Tests, Microbial Sensitivity
D002511 Cephalosporins A group of broad-spectrum antibiotics first isolated from the Mediterranean fungus ACREMONIUM. They contain the beta-lactam moiety thia-azabicyclo-octenecarboxylic acid also called 7-aminocephalosporanic acid. Antibiotics, Cephalosporin,Cephalosporanic Acid,Cephalosporin,Cephalosporin Antibiotic,Cephalosporanic Acids,Acid, Cephalosporanic,Acids, Cephalosporanic,Antibiotic, Cephalosporin,Cephalosporin Antibiotics
D000900 Anti-Bacterial Agents Substances that inhibit the growth or reproduction of BACTERIA. Anti-Bacterial Agent,Anti-Bacterial Compound,Anti-Mycobacterial Agent,Antibacterial Agent,Antibiotics,Antimycobacterial Agent,Bacteriocidal Agent,Bacteriocide,Anti-Bacterial Compounds,Anti-Mycobacterial Agents,Antibacterial Agents,Antibiotic,Antimycobacterial Agents,Bacteriocidal Agents,Bacteriocides,Agent, Anti-Bacterial,Agent, Anti-Mycobacterial,Agent, Antibacterial,Agent, Antimycobacterial,Agent, Bacteriocidal,Agents, Anti-Bacterial,Agents, Anti-Mycobacterial,Agents, Antibacterial,Agents, Antimycobacterial,Agents, Bacteriocidal,Anti Bacterial Agent,Anti Bacterial Agents,Anti Bacterial Compound,Anti Bacterial Compounds,Anti Mycobacterial Agent,Anti Mycobacterial Agents,Compound, Anti-Bacterial,Compounds, Anti-Bacterial
D001419 Bacteria One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive. Eubacteria
D015281 Cefmenoxime A cephalosporin antibiotic that is administered intravenously or intramuscularly. It is active against most common gram-positive and gram-negative microorganisms, is a potent inhibitor of Enterobacteriaceae, and is highly resistant to hydrolysis by beta-lactamases. The drug has a high rate of efficacy in many types of infection and to date no severe side effects have been noted. Abbott-50192,Cefmax,Cefmenoxime Hydrochloride,Cefmenoxime Hydrochloride (2:1),SCE-1365,Abbott 50192,Abbott50192,Hydrochloride, Cefmenoxime,SCE 1365,SCE1365
D015296 Ceftizoxime A semisynthetic cephalosporin antibiotic which can be administered intravenously or by suppository. The drug is highly resistant to a broad spectrum of beta-lactamases and is active against a wide range of both aerobic and anaerobic gram-positive and gram-negative organisms. It has few side effects and is reported to be safe and effective in aged patients and in patients with hematologic disorders. Ceftizoxime Sodium,Cefizox,Ceftizoxime Monosodium Salt,FK-749,FK749,FR-13749,SK&F 88373-2,SKF-88373,FK 749,FR 13749,FR13749,Monosodium Salt, Ceftizoxime,SK&F 88373 2,SK&F 883732,SKF 88373,SKF88373,Salt, Ceftizoxime Monosodium,Sodium, Ceftizoxime

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