Abstract
A rapid method based on solid phase cytometry (SPC) for the detection of Aspergillus fumigatus hyphae is described. With an enzymatic ‘viability’ staining procedure, fungal hyphae can be detected non-specifically within the hour. By combining this procedure with an immunofluorescence labelling, a distinction between Aspergillus spp. and other clinically important fungi is possible, except for Penicillium spp. due to cross-reactivity. To differentiate both genera, microcolonies are generated by incubation at 45 °C prior to viability staining. The latter approach in conjunction with immunofluorescence labelling allows a quasi-specific detection of A. fumigatus hyphae and has shown its applicability to samples of bronchoalveolar lavage liquid (BAL).
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