Biomaterial Database

Lysis enhancement: a novel form of interaction between beta-lactam antibiotics. 1975

D Greenwood, and F O'Grady

A novel form of synergy has been observed to occur between cephalexin and certain other beta-lactam antibiotics. In the presence of cephalexin a reduction was found in the concentration of other beta-lactam agents needed to induce lysis of Escherichia coli; the effect was particularly marded when cephalexin was allowed to act for a short time before the addition of the second agent. The basis of this type of synergy--which is not likely to be of therapeutic value--is discussed in terms of a theroy perviously put forward, whcih suggests that penicillins and cephalosporins have two distinct sites of action in Gram-negative bacilli.

UI	MeSH Term	Description	Entries
D009391	Nephelometry and Turbidimetry	Chemical analysis based on the phenomenon whereby light, passing through a medium with dispersed particles of a different refractive index from that of the medium, is attenuated in intensity by scattering. In turbidimetry, the intensity of light transmitted through the medium, the unscattered light, is measured. In nephelometry, the intensity of the scattered light is measured, usually, but not necessarily, at right angles to the incident light beam.	Turbidimetry,Nephelometry,Turbidimetry and Nephelometry
D010403	Penicillin Resistance	Nonsusceptibility of an organism to the action of penicillins.	Penicillin Resistances,Resistance, Penicillin,Resistances, Penicillin
D002506	Cephalexin	A semisynthetic cephalosporin antibiotic with antimicrobial activity similar to that of CEPHALORIDINE or CEPHALOTHIN, but somewhat less potent. It is effective against both gram-positive and gram-negative organisms.	5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((aminophenylacetyl)amino)-3-methyl-8-oxo-, (6R-(6alpha,7beta(R)))-,Cefalexin,Cephalexin Dihydride,Cephalexin Hemihydrate,Cephalexin Hydrochloride,Cephalexin Monohydrate,Cephalexin Monohydrochloride,Cephalexin Monohydrochloride, Monohydrate,Cephalexin, (6R-(6alpha,7alpha(R)))-Isomer,Cephalexin, (6R-(6alpha,7beta(S*)))-Isomer,Cephalexin, (6R-(6alpha,7beta))-Isomer,Cephalexin, Monosodium Salt,Cephalexin, Monosodium Salt, (6R-(6alpha,7beta))-Isomer,Ceporexine,Palitrex
D002509	Cephaloridine	A cephalosporin antibiotic.	Cefaloridine,Cephalomycine,Cephaloridin,Ceporin
D002512	Cephalothin	A cephalosporin antibiotic.	Cefalotin,Sodium Cephalothin,Cefalotina Normon,Cefalotina Sodica Spaly,Ceftina,Cephalothin Monosodium Salt,Keflin,Seffin,Cephalothin, Sodium,Monosodium Salt, Cephalothin,Salt, Cephalothin Monosodium
D004357	Drug Synergism	The action of a drug in promoting or enhancing the effectiveness of another drug.	Drug Potentiation,Drug Augmentation,Augmentation, Drug,Augmentations, Drug,Drug Augmentations,Drug Potentiations,Drug Synergisms,Potentiation, Drug,Potentiations, Drug,Synergism, Drug,Synergisms, Drug
D004926	Escherichia coli	A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.	Alkalescens-Dispar Group,Bacillus coli,Bacterium coli,Bacterium coli commune,Diffusely Adherent Escherichia coli,E coli,EAggEC,Enteroaggregative Escherichia coli,Enterococcus coli,Diffusely Adherent E. coli,Enteroaggregative E. coli,Enteroinvasive E. coli,Enteroinvasive Escherichia coli
D000667	Ampicillin	Semi-synthetic derivative of penicillin that functions as an orally active broad-spectrum antibiotic.	Penicillin, Aminobenzyl,Amcill,Aminobenzylpenicillin,Ampicillin Sodium,Ampicillin Trihydrate,Antibiotic KS-R1,Omnipen,Pentrexyl,Polycillin,Ukapen,Aminobenzyl Penicillin,Antibiotic KS R1,KS-R1, Antibiotic,Sodium, Ampicillin,Trihydrate, Ampicillin
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
D001433	Bacteriolysis	Rupture of bacterial cells due to mechanical force, chemical action, or the lytic growth of BACTERIOPHAGES.	Bacteriolyses