Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0085437 (bacterial meningitis)
 4,038 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This paper describes a gradient system for separating D- and L-isomers of Dns-amino acids by mixed chelate complexation through the addition of histidine methyl ester and copper sulfate to the mobile phase. Most of the biologically important amino acids were separated in a single analysis. With a simple solvent gradient consisting of increasing concentrations of acetonitrile in L-histidine methyl ester buffer all the common amino acids were resolved except cysteine and all optical isomers were resolved except those of threonine, alanine and proline. Analysis time was 90 min. Use of this system for determining non-protein amino acids in human cerebrospinal fluid showed the amino acids to be L-isomers, as expected. The pattern in fluid from a patient with bacterial meningitis was different from that of most of the others.
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PMID:Stereoselective D- and L-amino acid analysis by high-performance liquid chromatography. 673 58

A total of 395 Haemophilus influenzae strains from 226 Japanese institutions participating in the Nationwide Surveillance Study Group for Bacterial Meningitis were received from 1999 to 2002. All strains were analyzed by PCR to identify the resistance genes, and their susceptibilities to beta-lactam agents were determined. Of these strains, 29.1% were beta-lactamase nonproducing and ampicillin (AMP) susceptible (BLNAS) and lacked all resistance genes; 15.4% were beta-lactamase producing and AMP resistant and had the bla(TEM-1) gene; 30.6% were beta-lactamase nonproducing and AMP resistant (low-BLNAR) and had a Lys-526 or His-517 amino acid substitution in ftsI encoding PBP 3; 13.9% were beta-lactamase nonproducing and AMP resistant (BLNAR) and had an additional substitution of Thr-385 in ftsI; 9.1% were amoxicillin-clavulanic acid resistant (BLPACR I) and had the bla(TEM-1) gene and a Lys-526 or His-517 amino acid substitution in ftsI; and 1.8% showed resistance similar to that of the BLPACR I group (BLPACR II) but had bla(TEM-1) gene and ftsI substitutions, as was the case for the BLNAR strains. All but three strains were serotype b. The prevalence of BLNAR strains has increased rapidly: 0% in 1999, 5.8% in 2000, 14.1% in 2001, and 21.3% in 2002. The MICs at which 90% of BLNAR isolates were inhibited were as follows: AMP, 16 micro g/ml; cefotaxime, 1 micro g/ml; ceftriaxone, 0.25 micro g/ml; and meropenem, 0.5 micro g/ml. All of these values were higher than those for the BLNAS counterpart strains. The relatively wide distributions of the beta-lactam MICs for BLNAR strains presumably reflect variations in ftsI gene mutations. Pulsed-field gel electrophoresis suggested the rapid spread of specific H. influenzae type b strains throughout Japan. Expedited vaccination, rapid identification, and judicious antibiotic use could slow their spread.
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PMID:Rapidly increasing prevalence of beta-lactamase-nonproducing, ampicillin-resistant Haemophilus influenzae type b in patients with meningitis. 1510 98