ArticleMycoses2025
Diagnostic Value of Microscopy, Galactomannan, and PCR in Aspergillus Culture-Positive BALF Samples: A Laboratory-Based Pilot Study.
Article in Mycoses, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Managing Breakthrough Fungal Infections in Hematologic Patients: Determinants and Practical Management from a Latin American Perspective on Behalf of INFOCUS LATAM-ISHAM Working Group.Microorganisms · 2026Review
- Late-onset fungal infection of the bronchial stump post-lung resection: a report of two rare cases ofAME case reports · 2026Article
- Article
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3 authors.
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Abstract
backgroundDiagnosing invasive aspergillosis (IA) remains challenging despite the availability of various tests due to the limited sensitivity and variability in accuracy depending on the clinical context. Laboratory-based definitions consider different mycological criteria, such as culture and galactomannan (GM) positivity, equivalent in diagnostic weight. However, a more detailed analysis is essential for reliably distinguishing true infection from colonisation.
objectivesThis laboratory-based pilot study aimed to evaluate the diagnostic reliability of culture positivity by comparing it with fungal microscopy, GM testing, and Aspergillus-specific PCR in bronchoalveolar lavage fluid (BALF) samples, all of which were culture-positive for Aspergillus. MATERIALS AND
methodsNinety-two Aspergillus fumigatus culture-positive BALF specimens were obtained from mixed patient populations, displaying various risk factors for IA. The multi-assay approach used direct microscopy, GM, and Aspergillus-specific PCR. The diagnostic value of each test was assessed utilising a composite score based on mycological findings and clinical suspicion.
resultsAmong 92 culture-positive BALF samples, positivity rates for microscopy, GM, and PCR were 12.0% (n = 11), 27.2% (n = 25), and 28.3% (n = 26), respectively. Notably, in 58.7% (n = 54) of cases, culture positivity was not supported by any other mycological test. Direct microscopy showed the strongest correlation with other diagnostic methods, whereas GM and PCR showed moderate agreement.
conclusionsBased on our data, the current practice of weighing all mycological parameters equally should be reconsidered, with greater emphasis on microscopy and multimodal diagnostics rather than on culture alone, particularly in non-neutropenic patients.
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