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[The significance of Candida antigen detection in internal medicine and surgical patients]

M Knoke1, H Bernhardt, M Schwenke

  • 1Klinik für Innere Medizin, Ernst-Moritz-Arndt-Universität Greifswald.

Mycoses
|January 1, 1991
PubMed

Insights

This study compared three Candida antigen tests in surgical patients. Mannan antigen tests showed similar positive results, but varied in detecting fungal presence in various samples.

Area of Science:

  • Medical Mycology
  • Clinical Diagnostics
  • Infectious Diseases

Background:

  • Candida species are common causes of opportunistic infections, particularly in immunocompromised and surgical patients.
  • Accurate and timely diagnosis of invasive candidiasis (endomycosis) is crucial for effective treatment and improved patient outcomes.
  • Current diagnostic methods for Candida infections have limitations in sensitivity and specificity.

Purpose of the Study:

  • To evaluate and compare the performance of three different Candida antigen detection tests in internal-surgical patients.
  • To assess the utility of Candida mannan antigen (C-Mannan-Dresden, Pastorex-Candida) and a cytoplasmic antigen test (Cand-Tec) in diagnosing fungal infections.
  • To correlate antigen test results with the occurrence of fungi in various clinical specimens.

Main Methods:

  • Three distinct Candida antigen tests were employed: two mannan antigen tests and one cytoplasmic antigen test.
  • Patient samples from internal-surgical settings were analyzed using these diagnostic assays.
  • The study involved monitoring antigen test positivity in relation to fungal detection in feces, sputum, urine, and mouth smears.
  • Clinical cases were reviewed to illustrate the application and interpretation of the test results.

Main Results:

  • Both Candida mannan antigen tests demonstrated comparable positive findings.
  • Discrepancies were observed in test negativity when increased fungal presence was noted in samples like feces, sputum, urine, and mouth smears.
  • Higher positivity titers across all three antigen tests correlated with an increased likelihood of detecting endomycosis.
  • Specific clinical case discussions highlighted the practical implications of the test results.

Conclusions:

  • Candida mannan antigen tests offer similar diagnostic capabilities for detecting fungal infections.
  • The interpretation of antigen test results requires careful consideration of sample type and clinical context due to observed variations.
  • Increased antigen test positivity, reflected in titer courses, is a valuable indicator for diagnosing invasive candidiasis (endomycosis).

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