False-positive Aspergillus galactomannan assay in solid organ transplant recipients with histoplasmosis

P. Vergidis, R. C. Walker, D. R. Kaul, C. A. Kauffman, Alison Gail Freifeld, D. C. Slagle, A. K. Kressel, L. J. Wheat

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Post-transplantation histoplasmosis may be acquired via inhalation, may result from endogenous reactivation, or may be derived from the allograft. The Histoplasma and Aspergillus enzyme-linked immunoassays are increasingly being relied upon for rapid diagnosis of fungal infections, especially in immunocompromised patients. We describe 4 cases of solid organ transplant recipients who had histoplasmosis and a falsely positive Aspergillus galactomannan (GM) obtained from the serum or bronchoalveolar lavage (BAL) fluid. We also report our experience, testing for Histoplasma antigen (Ag) in specimens positive for Aspergillus GM. From January 2007 through December 2010, of 2432 unique patients who had positive Aspergillus GM tests, 514 (21%) were tested for Histoplasma Ag, and 27 were found to be positive. Most specimens that tested positive for both Aspergillus and Histoplasma were obtained by BAL. False-positive tests for Aspergillus GM can occur in immunosuppressed patients who have histoplasmosis, and may obscure the correct diagnosis.

Original languageEnglish (US)
Pages (from-to)213-217
Number of pages5
JournalTransplant Infectious Disease
Volume14
Issue number2
DOIs
StatePublished - Apr 2012

Fingerprint

Histoplasmosis
Aspergillus
Histoplasma
Transplants
Antigens
Mycoses
Bronchoalveolar Lavage Fluid
Immunocompromised Host
Bronchoalveolar Lavage
Immunoenzyme Techniques
Inhalation
Allografts
galactomannan
Transplant Recipients
Transplantation
Serum

Keywords

  • Aspergillosis
  • Galactomannan assay
  • Histoplasma antigen
  • Histoplasmosis
  • Solid organ transplant recipients

ASJC Scopus subject areas

  • Transplantation
  • Infectious Diseases

Cite this

False-positive Aspergillus galactomannan assay in solid organ transplant recipients with histoplasmosis. / Vergidis, P.; Walker, R. C.; Kaul, D. R.; Kauffman, C. A.; Freifeld, Alison Gail; Slagle, D. C.; Kressel, A. K.; Wheat, L. J.

In: Transplant Infectious Disease, Vol. 14, No. 2, 04.2012, p. 213-217.

Research output: Contribution to journalArticle

Vergidis, P. ; Walker, R. C. ; Kaul, D. R. ; Kauffman, C. A. ; Freifeld, Alison Gail ; Slagle, D. C. ; Kressel, A. K. ; Wheat, L. J. / False-positive Aspergillus galactomannan assay in solid organ transplant recipients with histoplasmosis. In: Transplant Infectious Disease. 2012 ; Vol. 14, No. 2. pp. 213-217.
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