• antigens
  • The present authors' objective was to assess their diagnostic value by developing scores from a panel of specific antigens tested by two techniques (electrosyneresis and double diffusion) to discriminate active HP from other interstitial lung diseases. (ersjournals.com)
  • These limitations may be due to the use of poorly purified antigens, the lack of the specific inciting antigen in the test panel, inappropriate techniques 8 or, in epidemiological studies, the use of inappropriate control groups 5 , 9 , 10 . (ersjournals.com)
  • Subjects were tested by two serological techniques (electrosyneresis and double diffusion) for a panel of seven antigens. (ersjournals.com)
  • sera
  • His experiments with the sera consisted in the precipitin tests. (ajtmh.org)
  • Nineteen strains of VEE virus, identical by neutralization (N) tests, were shown by hemagglutination-inhibition tests with anti-E 2 glycoprotein sera to represent a new subtype VI of the VEE complex. (ajtmh.org)
  • lines
  • After 24 hours of incubation at 37 degrees Celsius, plates are examined with transmitted light for the presence of fine precipitin lines at a 45-degree angle to the streaks. (wikipedia.org)
  • known
  • Strains to be tested, known positive and negative toxigenic strains are streaked on the agar's surface in a line across the plate, and at a right angle to the antitoxin paper strip. (wikipedia.org)
  • The antigen is quantitated by measuring the diameter of the precipitin circle and comparing it with the diameters of precipitin circles formed by known quantities or concentrations of the antigen. (wikipedia.org)
  • method
  • Therefore, a graph that compares the quantities or concentrations of antigen in the original samples with the areas or the squares of the diameters of the precipitin circles on linear scales will usually be a straight line when all circles have reached their end points (equivalence method). (wikipedia.org)
  • negative
  • The test, as expected, is frequently negative in acute amebic dysentery and, desirably, it is often negative in the asymptomatic carrier state, permitting an exclusion of up to 50 per cent of individuals who harbor this parasite without symptoms. (ajtmh.org)