Sökning: "False Negative Reactions"

Hittade 4 avhandlingar innehållade orden False Negative Reactions.

  1. 1. Laser Doppler imaging of patch tests : a methodological and comparative study with visual assessments

    Författare :Bolli Bjarnason; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; skin perfusion; laser Doppler perfusion imaging; laser Doppler perfusion scanning; contact dermatitis; patch test technique; test procedure; test method; test system; patch test optimization; serial dilution; dose; exposure time; application time; reading time; immunosuppression; pigmented patch test materials; edge effect; nickel; isothiazolinones; corticosteroids; budesonide; neomycin; balsam of Peru;

    Sammanfattning : Optimal test technique for most allergens is lacking. Despite technological progress in the 20th century, patch tests are habitually still assessed visually. Morphology of definite positive patch tests is unknown, reflected by various reading scales available and false-positive tests. LÄS MER

  2. 2. Contact allergy to fragrances with a focus on oak moss absolute

    Författare :Martin Mowitz; Yrkes- och miljödermatologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICAL AND HEALTH SCIENCES; contact allergy; allergic contact dermatitis; fragrance; patch test; repeated open application test;

    Sammanfattning : The exposure to fragrances is widespread and contact allergy to fragrance substances affects 1–4% of the general population. Many fragrance substances are volatile and it can therefore be suspected that they may evaporate from petrolatum patch test preparations applied in test chambers. LÄS MER

  3. 3. The Primary Lymphocyte Culture in the Diagnosis of Drug- and Metal-Induced Allergy

    Författare :Karin Cederbrant; Ernst Gleichmann; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Drugs and metals are examples of xenobiotics that can induce hypersensitivity in humans. These adverse reactions are classified as allergy if repeated exposure leads to the same type of clinical manifestation. Together with the clinical history, the skin test is the most commonly used test for the diagnosis of allergic disease. LÄS MER

  4. 4. Species specific susceptibility testing for ß-lactam antibiotics. With special reference to staphylococci

    Författare :Ann Cathrine Petersson; Avdelningen för medicinsk mikrobiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bakteriologi; mycology; Mikrobiologi; virology; bacteriology; beta-lactamase; staphylococcus; methicillin resistance; Microbiology; mecA susceptibility testing; virologi; mykologi;

    Sammanfattning : The main objective of this thesis was to identify methods for the detection of ß-lactam resistance in staphylococci, bacteria often causing nosocomial infections. Detection of ß-lactam resistance in these species is difficult due to strong regulation of genes encoding for the two main resistance mechanisms, ß-lactamase production and the penicillin-binding protein (PBP) 2?. LÄS MER