Published in Antimicrob Agents Chemother on November 01, 1990
A functional classification scheme for beta-lactamases and its correlation with molecular structure. Antimicrob Agents Chemother (1995) 26.51
Detection of plasmid-mediated AmpC beta-lactamase genes in clinical isolates by using multiplex PCR. J Clin Microbiol (2002) 12.53
beta-Lactamases in laboratory and clinical resistance. Clin Microbiol Rev (1995) 12.53
More extended-spectrum beta-lactamases. Antimicrob Agents Chemother (1991) 11.28
Molecular characterization of an enterobacterial metallo beta-lactamase found in a clinical isolate of Serratia marcescens that shows imipenem resistance. Antimicrob Agents Chemother (1994) 8.64
Plasmid-determined AmpC-type beta-lactamases. Antimicrob Agents Chemother (2002) 7.73
AmpC beta-lactamases. Clin Microbiol Rev (2009) 7.14
Imipenem resistance in Klebsiella pneumoniae is associated with the combination of ACT-1, a plasmid-mediated AmpC beta-lactamase, and the foss of an outer membrane protein. Antimicrob Agents Chemother (1997) 7.07
Plasmid-mediated dissemination of the metallo-beta-lactamase gene blaIMP among clinically isolated strains of Serratia marcescens. Antimicrob Agents Chemother (1995) 4.71
Characterization of the plasmidic beta-lactamase CMY-2, which is responsible for cephamycin resistance. Antimicrob Agents Chemother (1996) 4.41
Roles of beta-lactamases and porins in activities of carbapenems and cephalosporins against Klebsiella pneumoniae. Antimicrob Agents Chemother (1999) 3.85
beta-Lactamases responsible for resistance to expanded-spectrum cephalosporins in Klebsiella pneumoniae, Escherichia coli, and Proteus mirabilis isolates recovered in South Africa. Antimicrob Agents Chemother (1998) 3.76
In vivo selection of porin-deficient mutants of Klebsiella pneumoniae with increased resistance to cefoxitin and expanded-spectrum-cephalosporins. Antimicrob Agents Chemother (1996) 3.73
Characterization of a novel extended-spectrum beta-lactamase from Pseudomonas aeruginosa. Antimicrob Agents Chemother (1993) 3.44
Detection of extended-spectrum beta-lactamases in members of the family Enterobacteriaceae: comparison of the double-disk and three-dimensional tests. Antimicrob Agents Chemother (1992) 3.31
Outbreak of ceftazidime resistance due to a novel extended-spectrum beta-lactamase in isolates from cancer patients. Antimicrob Agents Chemother (1992) 3.31
Plasmid-mediated AmpC-type beta-lactamase isolated from Klebsiella pneumoniae confers resistance to broad-spectrum beta-lactams, including moxalactam. Antimicrob Agents Chemother (1993) 3.19
Salmonella enteritidis: AmpC plasmid-mediated inducible beta-lactamase (DHA-1) with an ampR gene from Morganella morganii. Antimicrob Agents Chemother (1998) 3.17
Gene sequence and biochemical characterization of FOX-1 from Klebsiella pneumoniae, a new AmpC-type plasmid-mediated beta-lactamase with two molecular variants. Antimicrob Agents Chemother (1994) 3.09
OXA-11, an extended-spectrum variant of OXA-10 (PSE-2) beta-lactamase from Pseudomonas aeruginosa. Antimicrob Agents Chemother (1993) 3.09
Genetics of extended-spectrum beta-lactamases. Eur J Clin Microbiol Infect Dis (1994) 2.80
Comparative characterization of the cephamycinase blaCMY-1 gene and its relationship with other beta-lactamase genes. Antimicrob Agents Chemother (1996) 2.77
AmpC disk test for detection of plasmid-mediated AmpC beta-lactamases in Enterobacteriaceae lacking chromosomal AmpC beta-lactamases. J Clin Microbiol (2005) 2.74
Transferable cefoxitin resistance in enterobacteria from Greek hospitals and characterization of a plasmid-mediated group 1 beta-lactamase (LAT-2). Antimicrob Agents Chemother (1996) 2.74
Cloning and sequence analysis of blaBIL-1, a plasmid-mediated class C beta-lactamase gene in Escherichia coli BS. Antimicrob Agents Chemother (1994) 2.74
Occurrence and detection of AmpC beta-lactamases among Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis isolates at a veterans medical center. J Clin Microbiol (2000) 2.71
IBC-1, a novel integron-associated class A beta-lactamase with extended-spectrum properties produced by an Enterobacter cloacae clinical strain. Antimicrob Agents Chemother (2000) 2.62
Outer membrane profiles of clonally related Klebsiella pneumoniae isolates from clinical samples and activities of cephalosporins and carbapenems. Antimicrob Agents Chemother (1998) 2.60
Controversies about extended-spectrum and AmpC beta-lactamases. Emerg Infect Dis (2001) 2.59
Detection of Klebsiella pneumoniae and Escherichia coli strains producing extended-spectrum beta-lactamases. J Clin Microbiol (1994) 2.47
Inhibitor-based methods for detection of plasmid-mediated AmpC beta-lactamases in Klebsiella spp., Escherichia coli, and Proteus mirabilis. J Clin Microbiol (2005) 2.46
Practical methods using boronic acid compounds for identification of class C beta-lactamase-producing Klebsiella pneumoniae and Escherichia coli. J Clin Microbiol (2005) 2.43
A novel type of AmpC beta-lactamase, ACC-1, produced by a Klebsiella pneumoniae strain causing nosocomial pneumonia. Antimicrob Agents Chemother (1999) 2.40
Epidemiology of conjugative plasmid-mediated AmpC beta-lactamases in the United States. Antimicrob Agents Chemother (2004) 2.27
Characterization and nucleotide sequence of a Klebsiella oxytoca cryptic plasmid encoding a CMY-type beta-lactamase: confirmation that the plasmid-mediated cephamycinase originated from the Citrobacter freundii AmpC beta-lactamase. Antimicrob Agents Chemother (1999) 2.27
Epidemiology and clinical features of bloodstream infections caused by AmpC-type-beta-lactamase-producing Klebsiella pneumoniae. Antimicrob Agents Chemother (2004) 2.20
Nucleotide sequence of a plasmid-mediated cephalosporinase gene (blaLAT-1) found in Klebsiella pneumoniae. Antimicrob Agents Chemother (1994) 2.13
Dissemination of CTX-M-3 and CMY-2 beta-lactamases among clinical isolates of Escherichia coli in southern Taiwan. J Clin Microbiol (2000) 2.11
Prevalence of newer beta-lactamases in gram-negative clinical isolates collected in the United States from 2001 to 2002. J Clin Microbiol (2006) 2.06
Controlling false-positive results obtained with the Hodge and Masuda assays for detection of class a carbapenemase in species of enterobacteriaceae by incorporating boronic Acid. J Clin Microbiol (2010) 1.97
Origin and impact of plasmid-mediated extended-spectrum beta-lactamases. Eur J Clin Microbiol Infect Dis (1994) 1.94
Characterization of FOX-3, an AmpC-type plasmid-mediated beta-lactamase from an Italian isolate of Klebsiella oxytoca. Antimicrob Agents Chemother (1998) 1.85
Cloning and biochemical characterization of FOX-5, an AmpC-type plasmid-encoded beta-lactamase from a New York City Klebsiella pneumoniae clinical isolate. Antimicrob Agents Chemother (2001) 1.81
Ceftazidime-resistant Klebsiella pneumoniae and Escherichia coli isolates producing TEM-10 and TEM-43 beta-lactamases from St. Louis, Missouri. Antimicrob Agents Chemother (1998) 1.77
Origin and evolution of the AmpC beta-lactamases of Citrobacter freundii. Antimicrob Agents Chemother (2002) 1.75
Molecular characterization of cefoxitin-resistant Escherichia coli from Canadian hospitals. Antimicrob Agents Chemother (2005) 1.74
Use of microdilution panels with and without beta-lactamase inhibitors as a phenotypic test for beta-lactamase production among Escherichia coli, Klebsiella spp., Enterobacter spp., Citrobacter freundii, and Serratia marcescens. Antimicrob Agents Chemother (1999) 1.68
A novel class C beta-lactamase (FOX-2) in Escherichia coli conferring resistance to cephamycins. Antimicrob Agents Chemother (1997) 1.64
Chromosomally encoded ampC-type beta-lactamase in a clinical isolate of Proteus mirabilis. Antimicrob Agents Chemother (1998) 1.61
Population-based laboratory surveillance for AmpC beta-lactamase-producing Escherichia coli, Calgary. Emerg Infect Dis (2007) 1.56
High-level resistance to cefotaxime and ceftazidime in Klebsiella pneumoniae isolates from Cleveland, Ohio. Antimicrob Agents Chemother (1991) 1.55
Emergence of DHA-1-producing Klebsiella spp. in the Parisian region: genetic organization of the ampC and ampR genes originating from Morganella morganii. Antimicrob Agents Chemother (2006) 1.51
Effects of inoculum and beta-lactamase activity in AmpC- and extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli and Klebsiella pneumoniae clinical isolates tested by using NCCLS ESBL methodology. J Clin Microbiol (2004) 1.50
First detection of the Ambler class C 1 AmpC beta-lactamase in Citrobacter freundii by a new, simple double-disk synergy test. J Clin Microbiol (2006) 1.44
Beta-lactamase nomenclature. Antimicrob Agents Chemother (2006) 1.41
Sequences of homologous beta-lactamases from clinical isolates of Serratia marcescens with different substrate specificities. Antimicrob Agents Chemother (1998) 1.40
Sequence of the MIR-1 beta-lactamase gene. Antimicrob Agents Chemother (1999) 1.30
Phenotypic & molecular characterization of AmpC β-lactamases among Escherichia coli, Klebsiella spp. & Enterobacter spp. from five Indian Medical Centers. Indian J Med Res (2012) 1.27
Comparative evaluation of the inhibitory activities of the novel penicillanic acid sulfone Ro 48-1220 against beta-lactamases that belong to groups 1, 2b, and 2be. Antimicrob Agents Chemother (1997) 1.22
Multiplex asymmetric PCR-based oligonucleotide microarray for detection of drug resistance genes containing single mutations in Enterobacteriaceae. Antimicrob Agents Chemother (2007) 1.19
In vivo transfer of plasmid-encoded ACC-1 AmpC from Klebsiella pneumoniae to Escherichia coli in an infant and selection of impermeability to imipenem in K. pneumoniae. Antimicrob Agents Chemother (2005) 1.19
CFE-1, a novel plasmid-encoded AmpC beta-lactamase with an ampR gene originating from Citrobacter freundii. Antimicrob Agents Chemother (2004) 1.18
Efficacy of cefepime and imipenem in experimental murine pneumonia caused by porin-deficient Klebsiella pneumoniae producing CMY-2 beta-Lactamase. Antimicrob Agents Chemother (2005) 1.13
Identification of extended-spectrum, AmpC, and carbapenem- hydrolyzing beta-lactamases in Escherichia coli and Klebsiella pneumoniae by disk tests. J Clin Microbiol (2006) 1.10
In vitro selection of ramR and soxR mutants overexpressing efflux systems by fluoroquinolones as well as cefoxitin in Klebsiella pneumoniae. Antimicrob Agents Chemother (2011) 1.09
Study of an outbreak of cefoxitin-resistant Klebsiella pneumoniae in a general hospital. J Clin Microbiol (1997) 1.08
Development of test panel of beta-lactamases expressed in a common Escherichia coli host background for evaluation of new beta-lactam antibiotics. Antimicrob Agents Chemother (1995) 1.08
Use of beta-lactamase inhibitors in disk tests to detect plasmid-mediated AmpC beta-lactamases. J Clin Microbiol (2004) 1.05
Spread of a Klebsiella pneumoniae strain producing a plasmid-mediated ACC-1 AmpC beta-lactamase in a teaching hospital admitting disabled patients. Antimicrob Agents Chemother (2005) 1.04
The antimicrobial activity of cefotaxime: comparative multinational hospital isolate surveys covering 15 years. Infection (1994) 0.98
Evaluation of beta-lactamase inhibitors in disk tests for detection of plasmid-mediated AmpC beta-lactamases in well-characterized clinical strains of Klebsiella spp. J Clin Microbiol (2005) 0.90
Effect of porins and plasmid-mediated AmpC beta-lactamases on the efficacy of beta-lactams in rat pneumonia caused by Klebsiella pneumoniae. Antimicrob Agents Chemother (2006) 0.87
Comparative activity of several antimicrobial agents against nosocomial Gram-negative rods isolated across Canada. Can J Infect Dis (1995) 0.86
Promoter sequences necessary for high-level expression of the plasmid-associated ampC beta-lactamase gene blaMIR-1. Antimicrob Agents Chemother (2004) 0.86
Clinical significance of extended-spectrum beta-lactamases. Eur J Clin Microbiol Infect Dis (1994) 0.85
Establishment of in vitro susceptibility testing methodologies and comparative activities of piperacillin in combination with the penem {beta}-lactamase inhibitor BLI-489. Antimicrob Agents Chemother (2008) 0.85
Characterization of a novel AmpC-type plasmid-mediated beta-lactamase from an Escherichia coli strain isolated in China. Curr Microbiol (2008) 0.81
Detection of AmpC β Lactamases in Gram-negative Bacteria. J Lab Physicians (2014) 0.80
Cephalosporins--cefotaxime 10 years later, a major drug with continued use. Infection (1991) 0.79
The Beta Lactam Antibiotics as an Empirical Therapy in a Developing Country: An Update on Their Current Status and Recommendations to Counter the Resistance against Them. J Clin Diagn Res (2013) 0.78
Incidence and transferability of antibiotic resistance in the enteric bacteria isolated from hospital wastewater. Braz J Microbiol (2014) 0.78
Structural characterization of ISCR8, ISCR22, and ISCR23, subgroups of IS91-like insertion elements. Antimicrob Agents Chemother (2010) 0.78
Genotypic and Phenotypic Detection of AmpC β-lactamases in Enterobacter spp. Isolated from a Teaching Hospital in Malaysia. PLoS One (2016) 0.77
Distribution and Classification of Serine β-Lactamases in Brazilian Hospital Sewage and Other Environmental Metagenomes Deposited in Public Databases. Front Microbiol (2016) 0.75
Developing New Antimicrobial Therapies: Are Synergistic Combinations of Plant Extracts/Compounds with Conventional Antibiotics the Solution? Pharmacogn Rev (2017) 0.75
Emergence of co-production of plasmid-mediated AmpC beta-lactamase and ESBL in cefoxitin-resistant uropathogenic Escherichia coli. Eur J Clin Microbiol Infect Dis (2016) 0.75
DNA sequencing with chain-terminating inhibitors. Proc Natl Acad Sci U S A (1977) 790.54
Detection of specific sequences among DNA fragments separated by gel electrophoresis. J Mol Biol (1975) 503.08
Novel method for detection of beta-lactamases by using a chromogenic cephalosporin substrate. Antimicrob Agents Chemother (1972) 61.10
Supercoil sequencing: a fast and simple method for sequencing plasmid DNA. DNA (1985) 40.01
The use of analytical isoelectric focusing for detection and identification of beta-lactamases. J Gen Microbiol (1975) 19.91
A multiple plasmid-containing Escherichia coli strain: convenient source of size reference plasmid molecules. Plasmid (1978) 16.08
Transformation of Salmonella typhimurium by plasmid deoxyribonucleic acid. J Bacteriol (1974) 15.89
Extended-spectrum beta-lactamases. Antimicrob Agents Chemother (1989) 8.34
ampC cephalosporinase of Escherichia coli K-12 has a different evolutionary origin from that of beta-lactamases of the penicillinase type. Proc Natl Acad Sci U S A (1981) 8.21
R factors from Proteus rettgeri. J Gen Microbiol (1972) 7.83
Transferable resistance to cefotaxime, cefoxitin, cefamandole and cefuroxime in clinical isolates of Klebsiella pneumoniae and Serratia marcescens. Infection (1984) 7.53
Transferable resistance to third-generation cephalosporins in clinical isolates of Klebsiella pneumoniae: identification of CTX-1, a novel beta-lactamase. J Antimicrob Chemother (1987) 6.27
Evolution of plasmid-coded resistance to broad-spectrum cephalosporins. Antimicrob Agents Chemother (1985) 5.74
Close evolutionary relationship between the chromosomally encoded beta-lactamase gene of Klebsiella pneumoniae and the TEM beta-lactamase gene mediated by R plasmids. FEBS Lett (1986) 5.13
Rapid procedure for isolation of plasmid DNA and application to epidemiological analysis. J Clin Microbiol (1984) 5.09
Computerized microacidimetric determination of beta lactamase Michaelis-Menten constants. FEBS Lett (1973) 4.95
Chromosomal cephalosporinases responsible for multiple resistance to newer beta-lactam antibiotics. Annu Rev Microbiol (1987) 4.78
Types of beta-lactamase determined by plasmids in gram-negative bacteria. J Bacteriol (1979) 4.01
Novel R-factor borne beta-lactamase of Escherichia coli confering resistance to cephalosporins. Infection (1987) 3.86
Extended broad spectrum beta-lactamase in Klebsiella pneumoniae including resistance to cephamycins. Infection (1990) 3.80
Sequence and comparative analysis of three Enterobacter cloacae ampC beta-lactamase genes and their products. Biochem J (1988) 3.66
Sequence of PSE-2 beta-lactamase. Antimicrob Agents Chemother (1988) 3.65
Novel plasmid-mediated beta-lactamase in clinical isolates of Klebsiella pneumoniae more resistant to ceftazidime than to other broad-spectrum cephalosporins. Antimicrob Agents Chemother (1988) 3.59
Plasmid-mediated resistance to third-generation cephalosporins caused by point mutations in TEM-type penicillinase genes. Rev Infect Dis (1988) 3.49
Five novel plasmid-determined beta-lactamases. Antimicrob Agents Chemother (1985) 3.34
Cloning of SHV-2, OHIO-1, and OXA-6 beta-lactamases and cloning and sequencing of SHV-1 beta-lactamase. Antimicrob Agents Chemother (1990) 3.26
Comparison of polyacrylamide and agarose gel thin-layer isoelectric focusing for the characterization of beta-lactamases. Antimicrob Agents Chemother (1983) 3.19
Molecular cloning and DNA homology of plasmid-mediated beta-lactamase genes. Mol Gen Genet (1987) 3.12
Minimal size plasmids containing an M13 origin for production of single-strand transducing particles. J Mol Appl Genet (1984) 3.01
Activities of beta-lactam antibiotics against Escherichia coli strains producing extended-spectrum beta-lactamases. Antimicrob Agents Chemother (1990) 2.83
Properties of PSE-2 beta-lactamase and genetic basis for its production in Pseudomonas aeruginosa. Antimicrob Agents Chemother (1983) 2.82
Novel plasmid-mediated beta-lactamase from Escherichia coli that inactivates oxyimino-cephalosporins. Antimicrob Agents Chemother (1988) 2.82
Resistance caused by decreased penetration of beta-lactam antibiotics into Enterobacter cloacae. Antimicrob Agents Chemother (1985) 2.81
Resistance to cefamandole: derepression of beta-lactamases by cefoxitin and mutation in Enterobacter cloacae. J Infect Dis (1982) 2.71
Sequence elements determining ampC promoter strength in E. coli. EMBO J (1982) 2.35
Insertion of IS2 creates a novel ampC promoter in Escherichia coli. Cell (1983) 2.20
beta-Lactamases and beta-lactam resistance in Escherichia coli. Antimicrob Agents Chemother (1985) 2.09
Cefoxitin resistance by a chromosomal cephalosporinase in Escherichia coli. J Antibiot (Tokyo) (1980) 2.09
Detection of beta-lactamase production by gram-negative bacteria. J Antibiot (Tokyo) (1976) 2.06
Detection of plasmid-mediated beta-lactamases with DNA probes. Antimicrob Agents Chemother (1988) 1.99
A new filamentous bacteriophage with sex-factor specificity. Virology (1972) 1.85
Plasmid-determined beta-lactamase indistinguishable from the chromosomal beta-lactamase of Escherichia coli. J Bacteriol (1976) 1.69
A plasmid-mediated cephalosporinase from Achromobacter species. J Infect Dis (1982) 1.55
ampC beta-lactamase hyperproduction in Escherichia coli: natural ampicillin resistance generated by horizontal chromosomal DNA transfer from Shigella. Proc Natl Acad Sci U S A (1983) 1.38
Discrimination of extended-spectrum beta-lactamases by a novel nitrocefin competition assay. Antimicrob Agents Chemother (1990) 1.36
Beta-lactam antibiotics and selection of resistance: speculation on the evolution of R-plasmids. J Antimicrob Chemother (1986) 1.32
Beta-lactamase types and beta-lactam resistance of Escherichia coli strains with chromosomally mediated ampicillin resistance. Eur J Clin Microbiol Infect Dis (1990) 0.89
A functional classification scheme for beta-lactamases and its correlation with molecular structure. Antimicrob Agents Chemother (1995) 26.51
The introduction of jet injection mass vaccination into the national smallpox eradication program of Brazil. Trop Geogr Med (1971) 11.37
Quinolone resistance from a transferable plasmid. Lancet (1998) 11.28
More extended-spectrum beta-lactamases. Antimicrob Agents Chemother (1991) 11.28
Outbreak of ceftazidime resistance caused by extended-spectrum beta-lactamases at a Massachusetts chronic-care facility. Antimicrob Agents Chemother (1990) 5.81
Properties of R plasmids determining gentamicin resistance by acetylation in Pseudomonas aeruginosa. Antimicrob Agents Chemother (1974) 5.16
qnr prevalence in ceftazidime-resistant Enterobacteriaceae isolates from the United States. Antimicrob Agents Chemother (2006) 4.88
Evolution of extended-spectrum beta-lactam resistance (SHV-8) in a strain of Escherichia coli during multiple episodes of bacteremia. Antimicrob Agents Chemother (1997) 4.20
Roles of beta-lactamases and porins in activities of carbapenems and cephalosporins against Klebsiella pneumoniae. Antimicrob Agents Chemother (1999) 3.85
Effect of salt concentration on the apparent in-vitro susceptibility of Pseudomonas and other gram-negative bacilli to gentamicin. J Infect Dis (1971) 3.76
In vivo selection of porin-deficient mutants of Klebsiella pneumoniae with increased resistance to cefoxitin and expanded-spectrum-cephalosporins. Antimicrob Agents Chemother (1996) 3.73
Sequence of PSE-2 beta-lactamase. Antimicrob Agents Chemother (1988) 3.65
Outbreak of multidrug-resistant Enterococcus faecium with transferable vanB class vancomycin resistance. J Clin Microbiol (1994) 3.61
Plasmid-determined resistance to tellurium compounds. J Bacteriol (1977) 3.56
Characterization of IMI-1 beta-lactamase, a class A carbapenem-hydrolyzing enzyme from Enterobacter cloacae. Antimicrob Agents Chemother (1996) 3.44
Ampicillin-resistant Haemophilus influenzae type B possessing a TEM-type beta-lactamase but little permeability barrier to ampicillin. Lancet (1975) 3.34
Five novel plasmid-determined beta-lactamases. Antimicrob Agents Chemother (1985) 3.34
Vacuum blood-culture bottles inhibiting growth of Candida and fostering growth of Bacteroides. Lancet (1974) 3.26
Comparison of polyacrylamide and agarose gel thin-layer isoelectric focusing for the characterization of beta-lactamases. Antimicrob Agents Chemother (1983) 3.19
Molecular cloning and DNA homology of plasmid-mediated beta-lactamase genes. Mol Gen Genet (1987) 3.12
Molecular epidemiology of antibiotic resistance in salmonella from animals and human beings in the United States. N Engl J Med (1982) 2.97
Beta-lactamases. Br Med Bull (1984) 2.90
Properties of PSE-2 beta-lactamase and genetic basis for its production in Pseudomonas aeruginosa. Antimicrob Agents Chemother (1983) 2.82
Characterization of the extended-spectrum beta-lactamase reference strain, Klebsiella pneumoniae K6 (ATCC 700603), which produces the novel enzyme SHV-18. Antimicrob Agents Chemother (2000) 2.80
Identification of CTX-M-14 extended-spectrum beta-lactamase in clinical isolates of Shigella sonnei, Escherichia coli, and Klebsiella pneumoniae in Korea. J Clin Microbiol (2001) 2.80
Transposition of Pseudomonas toluene-degrading genes and expression in Escherichia coli. Nature (1978) 2.54
Detection of Klebsiella pneumoniae and Escherichia coli strains producing extended-spectrum beta-lactamases. J Clin Microbiol (1994) 2.47
Ampicillin treatment failure of apparently beta-lactamase-negative Haemophilus influenzae type b meningitis due to novel beta-lactamase. Lancet (1981) 2.41
The risk of endothelial infection in adults with salmonella bacteremia. Ann Intern Med (1978) 2.29
Spread of a "Pseudomonas-specific" beta-lactamase to plasmids of enterobacteria. J Bacteriol (1982) 2.28
Epidemiology of conjugative plasmid-mediated AmpC beta-lactamases in the United States. Antimicrob Agents Chemother (2004) 2.27
A unitary account of the repression mechanism of arginine biosynthesis in Escherichia coli. I. The genetic evidence. J Mol Biol (1969) 2.23
An animal source for the ROB-1 beta-lactamase of Haemophilus influenzae type b. Antimicrob Agents Chemother (1986) 2.21
Control of the argECBH cluster in Escherichia coli. Mol Gen Genet (1972) 2.18
SME-type carbapenem-hydrolyzing class A beta-lactamases from geographically diverse Serratia marcescens strains. Antimicrob Agents Chemother (2000) 2.15
Molecular structure and interrelationships of multiresistance beta-lactamase transposons. Plasmid (1988) 2.11
beta-Lactamases and beta-lactam resistance in Escherichia coli. Antimicrob Agents Chemother (1985) 2.09
Emergence and nosocomial transmission of ampicillin-resistant enterococci. Antimicrob Agents Chemother (1992) 2.07
Detection of plasmid-mediated beta-lactamases with DNA probes. Antimicrob Agents Chemother (1988) 1.99
Sequences of MGH-1, YOU-1, and YOU-2 extended-spectrum beta-lactamase genes. Antimicrob Agents Chemother (1993) 1.86
Properties of an R plasmid in Pseudomonas aeruginosa producing amikacin (BB-K8), butirosin, kanamycin, tobramycin, and sisomicin resistance. Antimicrob Agents Chemother (1974) 1.86
Sequence of the PSE-1 beta-lactamase gene. Antimicrob Agents Chemother (1991) 1.81
Recombination between plasmids of incompatibility groups P-1 and P-2. J Bacteriol (1976) 1.79
Dissemination of an antibiotic resistance plasmid in hospital patient flora. Antimicrob Agents Chemother (1980) 1.79
Fever of undetermined origin. N Engl J Med (1973) 1.77
Chromosomally mediated beta-lactamase production and gentamicin resistance in Enterococcus faecalis. Antimicrob Agents Chemother (1991) 1.75
Broad-spectrum, transmissible beta-lactamases. N Engl J Med (1988) 1.70
Pharmacodynamics of piperacillin alone and in combination with tazobactam against piperacillin-resistant and -susceptible organisms in an in vitro model of infection. Antimicrob Agents Chemother (1994) 1.70
Ribosomal ambiguity. Cold Spring Harb Symp Quant Biol (1966) 1.60
Broader distribution of plasmid-mediated quinolone resistance in the United States. Antimicrob Agents Chemother (2005) 1.60
The induction and repression of amino acid oxidation in Pseudomonas fluorescens. Biochem J (1964) 1.59
Computer-generated plots of results of antimicrobial-susceptibility tests. JAMA (1969) 1.58
Plasmid-determined resistance to boron and chromium compounds in Pseudomonas aeruginosa. Antimicrob Agents Chemother (1978) 1.58
Controlling vancomycin-resistant enterococci. Infect Control Hosp Epidemiol (1995) 1.55
Compatibility and molecular properties of plasmid Rms 149 in Pseudomonas aeruginosa and Escherichia coli. Plasmid (1980) 1.53
Recent experience with bacillemia due to gram-negative organisms. J Infect Dis (1971) 1.50
Mapping the gene determining ornithine transcarbamylase and its operator in Escherichia coli B. J Bacteriol (1971) 1.47
Genetic and biochemical properties of AER-1, a novel carbenicillin-hydrolyzing beta-lactamase from Aeromonas hydrophila. Antimicrob Agents Chemother (1985) 1.45
Spread of methicillin-resistant Staphylococcus aureus in a hospital after exposure to a health care worker with chronic sinusitis. Clin Infect Dis (1993) 1.44
The distribution of beta-lactamase genes on plasmids found in Pseudomonas. Plasmid (1979) 1.43
Diagnosis of gonorrhea in male patients by culture of uncentrifuged first-voided urine. JAMA (1977) 1.42
High rate of erythromycin and clarithromycin resistance among Streptococcus pneumoniae isolates from blood cultures from Providence, R.I. Antimicrob Agents Chemother (1993) 1.39
Predictors of effect of ampicillin-sulbactam against TEM-1 beta-lactamase-producing Escherichia coli in an in vitro dynamic model: enzyme activity versus MIC. Antimicrob Agents Chemother (1996) 1.39
Novel plasmid-mediated beta-lactamase in members of the family Enterobacteriaceae from Ohio. Antimicrob Agents Chemother (1986) 1.38
Effects of azlocillin in combination with clavulanic acid, sulbactam, and N-formimidoyl thienamycin against beta-lactamase-producing, carbenicillin-resistant Pseudomonas aeruginosa. Antimicrob Agents Chemother (1982) 1.38
Properties of a novel carbenicillin-hydrolyzing beta-lactamase (CARB-4) specified by an IncP-2 plasmid from Pseudomonas aeruginosa. Antimicrob Agents Chemother (1986) 1.37
Discrimination of extended-spectrum beta-lactamases by a novel nitrocefin competition assay. Antimicrob Agents Chemother (1990) 1.36
Activity of beta-lactam antibiotics against Pseudomonas aeruginosa carrying R plasmids determining different beta-lactamases. Antimicrob Agents Chemother (1979) 1.34
Evaluation of five different methods to prepare bacterial extracts for the identification of beta-lactamases by isoelectric focusing. J Antimicrob Chemother (1993) 1.34
International comparison of prevalence of resistance to antibiotics. JAMA (1978) 1.34
Epidemiology of extended-spectrum beta-lactamases. Clin Infect Dis (1998) 1.33
Properties of IncP-2 plasmids of Pseudomonas spp. Antimicrob Agents Chemother (1983) 1.30
Single-disk diffusion testing (Kirby-Bauer) of susceptibility of Proteus mirabilis to chloramphenicol: significance of the intermediate category. J Clin Microbiol (1980) 1.24
Treatment of transfusion-transmitted babesiosis by exchange transfusion. N Engl J Med (1980) 1.21
Characterization of the beta-lactamases of six species of Legionella. J Bacteriol (1982) 1.20
New plasmid-mediated oxacillin-hydrolyzing beta-lactamase in Pseudomonas aeruginosa. J Antimicrob Chemother (1986) 1.17
IS6770, an enterococcal insertion-like sequence useful for determining the clonal relationship of clinical enterococcal isolates. J Infect Dis (1994) 1.17
Induction of beta-lactamase and methicillin resistance in unusual strains of methicillin-resistant Staphylococcus aureus. J Antimicrob Chemother (1990) 1.17
Molecular epidemiology of OHIO-1 beta-lactamase. Antimicrob Agents Chemother (1987) 1.14
Plasmid modification of radiation and chemical-mutagen sensitivity in Pseudomonas aeruginosa. J Gen Microbiol (1977) 1.13
A colorimetric procedure for measuring beta-lactamase activity. Anal Biochem (1988) 1.11
Bacterial infection in renal homotransplant recipients. A study of fifty-three bacteremic episodes. Am J Med (1972) 1.11
Beta-lactamase effect on ampicillin treatment of Haemophilus influenzae B bacteremia and meningitis in infant rats. Antimicrob Agents Chemother (1977) 1.11
Role of beta-lactamase in expression of resistance by methicillin-resistant Staphylococcus aureus. Antimicrob Agents Chemother (1987) 1.11
Cross infection in a surgical ward caused by Pseudomonas aeruginosa with transferable resistance to gentamicin and tobramycin. J Clin Pathol (1977) 1.08
A common-source outbreak of Staphylococcus epidermidis infections among patients undergoing cardiac surgery. J Infect Dis (1990) 1.08
Listeroisis in immunosuppressed patients. A cluster of eight cases. Am J Med (1975) 1.08
Implications of antimicrobial resistance in the empirical treatment of community-acquired respiratory tract infections: the case of macrolides. J Antimicrob Chemother (2002) 1.05
Nosocomial outbreaks of multiresistant bacteria: extended-spectrum beta-lactamases have arrived in North America. Ann Intern Med (1993) 1.04
R factor-mediated increments in levels of resistance to and enzymatic degradation of penicillins and cephalosporins. Antimicrob Agents Chemother (Bethesda) (1967) 1.02
Comparative in vitro activity of piperacillin combined with the beta-lactamase inhibitor tazobactam (YTR 830). Diagn Microbiol Infect Dis (1990) 1.02
Transposition of mercury resistance from a transferable R plasmic of Escherichia coli. Plasmid (1980) 1.02