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Related Experiment Videos

Antigen detection in invasive aspergillosis.

J P Burnie1

  • 1Department of Medical Microbiology, Medical School, University of Manchester, U.K.

Journal of Immunological Methods
|October 25, 1991
PubMed
Summary

The reverse passive latex agglutination test and dot blot assay show potential for diagnosing invasive aspergillosis. Sensitivity improved when testing sera with maximum antigen levels.

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The efficacy of acquired humoral and cellular immunity in the prevention and therapy of experimental fungal infections.

Medical mycology·2001

Area of Science:

  • Medical Diagnostics
  • Mycology
  • Immunology

Background:

  • Invasive aspergillosis is a serious fungal infection, particularly in immunocompromised patients.
  • Accurate and timely diagnosis is crucial for effective treatment and improved patient outcomes.
  • Current diagnostic methods have limitations, necessitating the exploration of novel approaches.

Purpose of the Study:

  • To evaluate the diagnostic utility of a reverse passive latex agglutination test and a dot-blot assay for invasive aspergillosis.
  • To compare the sensitivity and specificity of these assays in proven and suspected cases.
  • To determine the impact of antigen levels on test performance.

Main Methods:

  • The study involved 50 proven and 28 suspected cases of invasive aspergillosis.
  • Reverse passive latex agglutination tests were performed on patient sera.
  • Dot-blot assays were also utilized to detect fungal antigens in sera.

Main Results:

  • The latex agglutination test showed a sensitivity of 29.4% and specificity of 96.3% at an initial titre cut-off of ≥1:8.
  • Sensitivity for the latex test increased to 55.1% when sera with maximum antigen levels were analyzed.
  • The dot-blot assay demonstrated higher initial sensitivity (33.3%), rising to 61.5% with maximum antigen level sera.

Conclusions:

  • Both reverse passive latex agglutination and dot-blot assays show promise in diagnosing invasive aspergillosis.
  • Testing sera with maximum antigen levels significantly enhances the sensitivity of both diagnostic methods.
  • The dot-blot assay appears to be more sensitive than the latex agglutination test in this patient cohort.

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