Abstract
Somatic (mycelial) and metabolic (culture filtrate) antigens of Aspergillus flavus, A. fumigatus, A. nidulans, A. niger and A. terreus were compared by line immunoelectrophoresis with sera from patients with allergic bronchopulmonary aspergillosis (ABPA) or aspergilloma, or from immunized animals. Number of lines observed when tested with human sera were similar for somatic and metabolic preparations of A. fumigatus, but up to 33 lines were present when both types of antigens were tested simultaneously. Cross-reactions between heterologous antigens and sera from patients with aspergilloma or ABPA were uncommon. In contrast, cross-reactions were common when standard antisera prepared in animals against heterologous species of Aspergillus were tested against A. fumigatus antigens. Lines of identity between homologous antigens and those from A. fumigatus were observed in 5 of 9 lines obtained with A. flavus, 4 of 16 lines of A. nidulans, 4 of 9 lines of A. niger and 4 of 8 lines of A. terreus.
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