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In vitro antibacterial properties of BRL 36650, a novel 6 alpha-substituted penicillin
BRL 36650 is a new type of penicillin in which a formamido group has been introduced into the 6 alpha-position of the nucleus. The compound is highly active against aerobic gram-negative bacteria and
Effect of antibiotics on non-growing planktonic cells and biofilms of Escherichia coli.
The results suggest that growth rate plays a role in mediating resistance of biofilms to antibiotics.
In Vitro Activities of Oral β-Lactams at Concentrations Achieved in Humans against Penicillin-Susceptible and -Resistant Pneumococci and Potential to Select Resistance
AMX and AMC were the only agents which consistently produced a >99% reduction in bacterial numbers in time-kill studies using concentrations of antibiotic achieved in middle ear fluid for all three strains of penicillin-resistant S. pneumoniae tested.
Bacteriological Efficacies of Three Macrolides Compared with Those of Amoxicillin-Clavulanate againstStreptococcus pneumoniae and Haemophilus influenzae
Amoxicillin-clavulanate was effective in vitro and in vivo against H. influenzae, and azithromycin showed unreliable activity against both pathogens, which may have clinical implications for the utility of macrolides in the empirical therapy of respiratory tract infections.
Studies on semi-synthetic 7 alpha-formamidocephalosporins. III. Synthesis and antibacterial activity of some 7 beta-[D-2-(aryl)-2-[(4-ethyl-2,3-dioxopiperazin-1-yl)carbonyl amino] acetamido]-7
The synthesis and antibacterial activity of 7 beta-[D-2-(aryl)-2-[(4-ethyl-2,3-dioxopiperazin-1-yl) carbonylamino] acetamido]-7 alpha-formamidocephalosporins with various substituents at the C-3
Uptake of a catecholic cephalosporin by the iron transport system of Escherichia coli.
Radio-ligand binding studies with a Fe-catecholic cephalosporin confirmed an association with these proteins, and confirmed that the iron-regulated outer membrane proteins (IROMPs) play a role in antibiotic uptake.
Synthesis and biological properties of some 3-[(N-substituted-amino)pyridinium-4-thiomethyl]-7-[2-(2-amino-thiazol- 4-yl)-2-(Z)-(methoxyimino)acetamido]ceph-3-em-4-carboxylates.
Gram-positive and Gram-negative bacteria including extended spectrum beta-lactamase-producing strains were most susceptible to the N-amino- and N-methylamino derivatives; with the exception of Pseudomonas aeruginosa, (3b) was more active in vitro and in vivo than cefpirome or ceftazidime.
Structure-activity relationships in a series of piperazine-2,3-dione containing penicillins and cephalosporins. II. Derivatives substituted at N(4) of the piperazine ring.
The structure-activity relationships within a series of penicillins and cephalosporins containing an N(4)-substituted piperazine-2,3-dione moiety in the C(6)/C(7)-beta-side chain are discussed.
Novel C-2 substituted carbapenem derivatives. Part IV. Synthesis and biological activity of five membered heteroaromatic derivatives.
Of the compounds investigated 1,5-disubstituted pyrazol-3-yl and 3-substituting isoxazol-5-yl derivatives have the best combination of antibacterial activity and stability to DHP-1.
Synthesis and biological activity of a series of piperazine-2,3-dione containing penicillins and 6 alpha-formamidopenicillins. I. Derivatives substituted at C(5) or C(6) of the piperazine ring.
The synthesis and antibacterial activity of a series of penicillins and 6 alpha-formamidopenicillins containing a C(5) or C(6)-substituted piperazine-2,3-dione moiety in the C(6)-beta-sidechain is