[Laser-assisted cataract surgery].
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Cataract Extraction↗
Biomedical subjects
C Vergés
Publications and source records attributed to C Vergés.
Cloning and sequence of the gene encoding a novel cefotaxime-hydrolyzing beta-lactamase (CTX-M-9) from Escherichia coli in Spain.
A new CTX-M-type beta-lactamase (CTX-M-9) has been cloned from a clinical cefotaxime-resistant Escherichia coli strain. Despite the close identity that exists between the CTX-M-9 and Toho-2 beta-lactamases (88%), the 35 amino acids located between residues Ala-185 and Ala-219 are totally different in both enzymes. Outside of this region there are only six amino acids substitutions between both proteins.
Amino Acid Sequence↗
[Incidence of extended spectrum beta lactamase in Escherichia coli in a university hospital from 1994-1996].
BACKGROUND: The aim of this study was to evaluate the incidence of TEM- and SHV-type extended spectrum betalactamases (ESBLs) in Escherichia coli in a 700-bed teaching hospital between 1994 and 1996. MATERIAL AND METHODS: Strains that presented reduced diameters to third-generation cephalosporins, as identified by disc diffusion techniques, were studied. The betalactamases involved were characterized by determination of the isoelectric point, hydrolysis profile, gene detection by polymerase chain reaction (PCR), and sequencing of the amplified products. RESULTS: 96 strains (1.4%) out of 7,054 strains of E. coli isolated between 1994 and 1996 showed decreased susceptibility to third-generation cephalosporins and only 4 strains (0.06%) produced ESBLs. Two strains produced SHV-2 and two produced TEM-12. CONCLUSIONS: The contribution of ESBL production to resistance to third-generation cephalosporins was low: 0.06% of all the E. coli strains isolated between 1994 and 1996.
Escherichia coli↗