IgG antibodies to three purified Aspergillus fumigatus antigens were determined by enzyme-linked immunosorbent assay (ELISA) in sera from 26 patients with definite pulmonary aspergillosis (group 1), 23 patients with suspected pulmonary aspergillosis (group 2), 8 patients with precipitating antibodies to A. fumigatus of undetermined clinical significance (group 3), and 113 healthy blood donors (group 4). With a 470,000-dalton antigen fraction ELISA values exceeded the upper range of group 4 (0.72) in 92, 91 and 13% of cases in groups 1, 2 and 3, respectively. With a 250,000-dalton antigen fraction the figures were 96, 78 and 13%, respectively (upper range of group 4 = 0.25). With an antigen fraction of 25,000–50,000 daltons the figures were 96, 65 and 13%, respectively (upper range of group 4 = 0.18). In 48 of 49 cases of definite or suspected aspergillosis (groups 1 + 2) ELISA values with at least one antigen exceeded the upper range of controls (group 4). It appears that antibody determination with these three antigen fractions may have a high diagnostic sensitivity.

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© 1984 S. Karger AG, Basel
1984
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