• occurrence
  • Biological samples have long been used in multiple laboratory investigations, and this procedure has been an issue of concern, as the samples are submitted to repeated freeze-thaw cycles, which may affect the results of a particular immunodiagnostic assay, due to the occurrence of physical damage to the antibody of interest. (jbpml.org.br)
  • 0.05), nor adverse effect were observed in weakly reactive samples, such as the occurrence of false-negative results. (jbpml.org.br)
  • In other studies, D.P. Agarwal and colleagues associated race-based variations in the activity alcohol-metabolizing enzymes with the occurrence of alcohol flush reactions to alcohol and alcoholic beverages in certain Asian populations. (wikipedia.org)
  • respiratory
  • Alcohol-induced respiratory reactions, also termed alcohol-induced asthma and alcohol-induced respiratory symptoms, are increasingly recognized as a pathological bronchoconstriction response to the consumption of alcohol that afflicts many people with a "classical" form of asthma, the airway constriction disease evoked by the inhalation of allergens. (wikipedia.org)
  • Alcohol-induced respiratory reactions reflect the operation of different and often racially related mechanisms that differ from those of classical, allergen-induced asthma. (wikipedia.org)
  • This early work is the basis for further studies that have defined not only many alcohol-induced flush reactions but also many alcohol-induced respiratory reactions as due to racially associated genetic differences in alcohol-metabolizing enzymes. (wikipedia.org)
  • patients
  • None of these six research groups to report negative findings - which in the case of the UK included Professor John Gow, Dr Jonathan Kerr and Dr Jonathan Stoye and used patient samples from physicians including Dr Abhijit Chaudhuri and Professor Peter Behan - have been able to find XMRV in blood samples from ME/CFS patients, or in the healthy controls. (meassociation.org.uk)
  • Results- Protein Z plasma levels were significantly lower in patients (mean 1.47 mg/L) than in controls (mean 1.93 mg/L) ( P =0.02). (ahajournals.org)
  • 7-9 With respect to arterial occlusive events occurring in SNS, protein Z status of patients with aPL-negative SNS seemed an interesting and yet unexplored perspective. (ahajournals.org)
  • Twenty-six patients with aPL-negative SNS (20 women, 6 men, mean age 48.9 years, range 36 to 64, mean body mass index 24.8) were enrolled in this study. (ahajournals.org)
  • 10 Given that nearly all aPL-positive patients with SNS receive long-term oral anticoagulation in our institution, 2 the study was restricted to aPL-negative SNS. (ahajournals.org)
  • Patients who routinely consume a food without any immediate reactions are unlikely to be allergic to that food. (neurologyadvisor.com)
  • However, their usefulness is limited by decreased sensitivity in early primary syphilis and during late syphilis, when a large number of untreated patients will be negative by these methods. (wikipedia.org)
  • tests
  • Even when using anticoagulants a high proportion of positive guaiac tests were found to be due to diagnosable lesions, suggesting anticoagulants may not cause bleeding unless there is an abnormality. (wikipedia.org)
  • An estimated 7--10 billion laboratory tests are performed each year in the United States ( 1,2 ), and laboratory test results influence approximately 70% of medical decisions ( 2--4 ). (cdc.gov)
  • Elimination diet test may be tried in the hospital, when allergy tests are negative, but food intolerance is still suspected. (healthhype.com)
  • If food allergy is still suspected, despite negative skin prick and blood tests, an oral challenge test may be done. (healthhype.com)
  • The tests are relatively simple to perform and interpret, and can allow rapid return of results and are very cheap. (wikipedia.org)
  • Variability
  • Our hypothesis is that the intervention group will have less variability as measured by mean deviation between exams and greater reliability as measured by the standard unreliability indexes of false positive rate, false negative rate, and fixation losses. (clinicaltrials.gov)
  • alcohol
  • The study suggested that the reaction was not allergen-induced but rather triggered by sulfur dioxide, a sulfur dioxide-related agent, or an agent whose levels in alcohol beverages correlated positively with those of sulfur dioxide. (wikipedia.org)
  • Alcohol-induced asthma reactions among Asians has been most thoroughly studied in those of native Japanese descent. (wikipedia.org)
  • findings
  • Since publication of these findings, there has been a great deal of interest from researchers in countries where ME/CFS is recognised and a number of research groups have attempted (or are still attempting) to confirm the positive findings. (meassociation.org.uk)
  • infections
  • The World Health Organization estimated that, as of 2000[update], inadequate blood screening had resulted in 1 million new HIV infections worldwide. (wikipedia.org)
  • color
  • A 3-10% solution of potassium hydroxide (KOH) gives a color change in some species of mushrooms: In Agaricus, some species such as A. xanthodermus turn yellow with KOH, many have no reaction, and A. subrutilescens turns green. (wikipedia.org)
  • The test is considered positive when a bright orange color forms where the lines cross. (wikipedia.org)
  • Vitamin C can cause analytical false negatives due to its anti-oxidant properties inhibiting the color reaction. (wikipedia.org)
  • confirm
  • In practice, it is possible to reanalyze the stored biological samples to confirm the results previously obtained or to perform further investigations. (jbpml.org.br)
  • collapse
  • The standard model includes a resource base of double that of what they have calculated, but the book includes model runs where the assumed resources are infinite, but those model runs still result in overshoot and collapse from other factors. (wikipedia.org)
  • skin
  • Patches with different food samples are placed on the back for 48-72 hours and resulting skin reaction is observed ( 2 ). (healthhype.com)
  • Secreted antibody may be preserved for long time for further anlysis This method cannot be applied if Mantoux test (tuberculin skin test) has been done within the last 40 days, because it can hamper the results of the ALS test. (wikipedia.org)
  • approximately
  • There are strips which serve different purposes, such as qualitative strips that only determine if the sample is positive or negative, or there are semi-quantitative ones that in addition to providing a positive or negative reaction also provide an estimation of a quantitative result, in the latter the colour reactions are approximately proportional to the concentration of the substance being tested for in the sample. (wikipedia.org)
  • minutes
  • The time taken for the appearance of the test results on the strip can vary from a few minutes after the test to 30 minutes after immersion of the strip in the urine (depending on the brand of product being used). (wikipedia.org)