Biomaterial Database

In vitro activity of ceftazidime in combination with other antibiotics. 1985

C Simon, and G Littschwager

189 bacterial strains were investigated for their in vitro sensitivity against ceftazidime (alone and in combination with another antibiotic). Moreover, the possibility to prevent development of secondary bacterial resistance as observed in subcultures at subinhibitory antibiotic concentrations, was studied using specific antibiotic combinations. Of 115 staphylococcal strains (91 strains of Staphylococcus aureus, 24 strains of Staphylococcus epidermidis), 2% were sensitive, 82% were moderately sensitive and 16% were resistant to ceftazidime. On combining ceftazidime with vancomycin, synergism was found in 61% of the strains, and secondary resistance to ceftazidime could be prevented with this combination. The combination of ceftazidime and clindamycin showed synergism in 26% and an additive effect in 48% of the strains. Secondary resistance to ceftazidime did not develop with this combination in subcultures at subinhibitory concentrations in which loss of activity was only minimal with clindamycin alone. Rifampicin and fusidic acid were highly active against staphylococci. In combination with ceftazidime, only weak synergism or additive effects were seen in most strains; no antagonism could be observed. In subcultures at subinhibitory concentrations, secondary resistance to rifampicin and fusidic acid developed rapidly and could be partially prevented by adding ceftazidime. Of 60 Pseudomonas aeruginosa strains, 84% were sensitive, 13% were moderately sensitive and 2% were resistant to ceftazidime. Synergism was most frequently observed when ceftazidime was combined with tobramycin. Using this combination, secondary resistance of Pseudomonas strains to ceftazidime did not develop. When ceftazidime was combined with piperacillin, synergism was observed in most strains, but the development of secondary resistance in vitro was not prevented.(ABSTRACT TRUNCATED AT 250 WORDS)

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
D010460	Peptococcus	A genus of gram-positive, anaerobic, coccoid bacteria that is part of the normal flora of the mouth, upper respiratory tract, and large intestine in humans. Its organisms cause infections of soft tissues and bacteremias.
D010462	Peptostreptococcus	A genus of gram-positive, anaerobic, coccoid bacteria that is part of the normal flora of humans. Its organisms are opportunistic pathogens causing bacteremias and soft tissue infections.
D010878	Piperacillin	Semisynthetic, broad-spectrum, AMPICILLIN derived ureidopenicillin antibiotic proposed for PSEUDOMONAS infections. It is also used in combination with other antibiotics.	AB-Piperacillin,Cl-227193,Pipcil,Pipera-Hameln,Piperacillin Curasan,Piperacillin Fresenius,Piperacillin Hexal,Piperacillin Monosodium Salt,Piperacillin Sodium,Piperacillin-Ratiopharm,Pipercillin,Pipracil,Pipril,T-1220,T1220,AB Piperacillin,Cl 227193,Cl227193,Curasan, Piperacillin,Monosodium Salt, Piperacillin,Pipera Hameln,Piperacillin Ratiopharm,Salt, Piperacillin Monosodium,Sodium, Piperacillin,T 1220
D011550	Pseudomonas aeruginosa	A species of gram-negative, aerobic, rod-shaped bacteria commonly isolated from clinical specimens (wound, burn, and urinary tract infections). It is also found widely distributed in soil and water. P. aeruginosa is a major agent of nosocomial infection.	Bacillus aeruginosus,Bacillus pyocyaneus,Bacterium aeruginosum,Bacterium pyocyaneum,Micrococcus pyocyaneus,Pseudomonas polycolor,Pseudomonas pyocyanea
D002442	Ceftazidime	Semisynthetic, broad-spectrum antibacterial derived from CEPHALORIDINE and used especially for Pseudomonas and other gram-negative infections in debilitated patients.	Ceftazidime Anhydrous,Ceftazidime Pentahydrate,Fortaz,Fortum,GR-20263,LY-139381,Pyridinium, 1-((7-(((2-amino-4-thiazolyl)((1-carboxy-1-methylethoxy)imino)acetyl)amino)-2-carboxy-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-en-3-yl)methyl)-, inner salt, pentahydrate, (6R-(6alpha,7beta(Z)))-,Tazidime,GR 20263,GR20263,LY 139381,LY139381
D002981	Clindamycin	An antibacterial agent that is a semisynthetic analog of LINCOMYCIN.	7-Chloro-7-deoxylincomycin,Chlolincocin,Chlorlincocin,Cleocin,Clindamycin Hydrochloride,Clindamycin Monohydrochloride,Clindamycin Monohydrochloride, Monohydrate,Dalacin C,7 Chloro 7 deoxylincomycin,Hydrochloride, Clindamycin,Monohydrate Clindamycin Monohydrochloride,Monohydrochloride, Clindamycin,Monohydrochloride, Monohydrate Clindamycin
D003013	Clostridium	A genus of motile or nonmotile gram-positive bacteria of the family Clostridiaceae. Many species have been identified with some being pathogenic. They occur in water, soil, and in the intestinal tract of humans and lower animals.
D004347	Drug Interactions	The action of a drug that may affect the activity, metabolism, or toxicity of another drug.	Drug Interaction,Interaction, Drug,Interactions, Drug
D005672	Fusidic Acid	An antibiotic isolated from the fermentation broth of Fusidium coccineum. (From Merck Index, 11th ed). It acts by inhibiting translocation during protein synthesis.	Fucithalmic,Fusidate Sodium,Fusidic Acid, Sodium Salt,Fusidin,Silver Fusidate,Sodium Fusidate,Stanicide,Acid, Fusidic,Fusidate, Silver,Fusidate, Sodium,Sodium, Fusidate