Abstract
A monoclonal antibody was produced against a Concanavalin A (Con A) binding major epitope of Aspergillus fumigatus using a novel method of immunization. The antigen was purified using monoclonal antibody affinity chromatography reacted with specific antibodies present in human sera. Both allergic bronchopulmonary aspergillosis and aspergilloma showed high levels of antibody, against this purified antigen, when compared to normal controls. Similar results were obtained when the monoclonal antibody was used in a capture antigen assay. The antibody reacted with several A. fumigatus extracts in rocket electrophoresis demonstrating a single precipitin arc, which disappeared when Con A intermediate gel was used. This monoclonal antibody demonstrated reactivity only with cytoplasmic components of hyphae and spores of A. fumigatus, when a colloidal gold was used as a probe in immunoelectron microscopy.
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