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A fluorogenic PCR-based method (TaqMan-PCR) was developed for typing and subtyping of influenza virus genomes in clinical specimens. The TaqMan-PCR employs a probe technology that exploits the endogenous 5'-3' nuclease activity of the Taq DNA polymerase to allow direct detection of the amplicon by release of a fluorescent reporter during the PCR. Therefore,(More)
A fluorometric assay in microtitre plates for the screening of phenylketonuria was evaluated and adapted to a neonatal screening programme. Using this assay, it is possible to determine quantitatively the phenylalanine concentration in dried blood spots on filter paper. The test exhibited a linear calibration curve with a good slope as well as sufficient(More)
A colorimetric microassay for the simultaneous quantitative determination of galactose (Gal) and galactose-1-phosphate (Gal-1-P) in dried blood spots is described. An enzymatic reaction involving alkaline phosphatase (EC and galactose dehydrogenase (EC produces NADH, which is coupled with diaphorase (EC and iodonitrotetrazolium(More)
Obesity has long been considered a potential risk factor for poor outcome following surgical procedures. However, controversy exists regarding the clinical impact of this problem because of a paucity of data regarding the incidence and risk of nosocomial infections in obese surgical patients. This retrospective study was undertaken to compare the nosocomial(More)
Die Influenza hat keine eindeutigen Symptome, und eine Diagnose allein anhand des klinischen Bildes ist unsicher. Der prädiktive Wert „typischer Symptome” ist von der Häufigkeit der entsprechenden Erkrankung abhängig. Einige Studien und Beobachtungen weisen auf einen hohen prädiktiven Wert „typischer” Influenza-Symptome bei sinnvoller Berücksichtigung der(More)
Annual influenza epidemics are caused by rapid evolution of the viral genome. Continuous and extensive antigenic variation has been shown for hemagglutinin (HA), the principal immunizing antigen of the virus. Monitoring of the antigenicity of circulating influenza viruses is necessary for selection of the most suitable vaccine strains. In this study,(More)
Influenzaviren haben eine hohe Variabilität. Entsprechend sollte jährlich mit einem aktuellen Impfstoff geimpft werden. Die Schutzwirkung hängt wesentlich von der Übereinstimmung der im Impfstoff enthaltenen Virusvarianten mit den tatsächlich zirkulierenden Varianten ab und kann von Saison zu Saison schwanken. Daher sind regelmäßige Studien zur(More)
The aim of this serological study was to demonstrate the extent to which antibodies react against subsequent drift variants, after vaccination with split vaccine (Fluarix). Antibody titers have been determined by hemagglutination inhibition test (HI) against different influenza A and B drift variants in sera from three past multicenter trials. Individuals(More)
A newly developed colorimetric method, DNA enzyme immunoassay (DEIA), was applied to the detection of neuraminidase subtypes N1 and N2 of influenza A viruses. Reverse transcription and polymerase chain reaction with universal primers were used for genomic amplification of H1N1, H2N2, and H3N2 strains. Following amplification, an aliquot of the PCR product(More)
The continuous antigenic drift of influenza viruses requires annual adaptation of the vaccine. Protection depends largely on the match of the variants represented in the vaccine with the viruses actually known to be in circulation and may differ considerably from season to season. Therefore studies to assess the efficacy and effectiveness of the vaccine are(More)