Use

Patients diagnosed with chronic granulomatous disease and/or Job's syndrome may yield a reduced detection of galactomannan.1 Reduced assay sensitivity may occur in patients receiving concomitant antifungal therapy.2 Penicillium species, Alternaria species, Paecilomyces species, Geotrichum species, and Histoplasma species have demonstrated reactivity with the monoclonal antibodies used in the assay and may, therefore, yield a positive test result. Positive results in patients with no clinical signs of disease have been reported, especially in young children.3 Most of these are considered to be false positives. Young children may have a positive assay result due to the presence of galactofuranaase contained in various foods (cereals) and milk. Patients receiving piperacillin/tazobactam or semisynthetic β-lactamase therapy may have false-positive results.4,5 False-positive results may also occur with use of Plasma-Lyte™ for either intravenous hydration or BAL specimen collection.6