Production of monoclonal antibodies to Fusarium oxysporum f.sp. cubense race 4
1988
The production of monoclonal antibodies (mab) to Fusarium oxysporum f.sp. cubense (Foc) race 4 is described. Heat-killed conidia of this fungus were toxic to female Balb/c mice, but this toxic reaction was not found with fractionated hyphal walls. A simple and reproducible enzyme immunoassay using a standard 9 cm polystyrene Petri dish as a solid phase was devised for screening culture supernatant fluids. Sixteen stable hybridoma clones secreting mabs of the IgM class were isolated by fusing splenic lymphocytes from immunized female Balb/c mice with P3-NSl-Ag4-l mouse myeloma cells. Monoclonal antibodies produced by eight of the 16 hybridoma clones were selected and the specificity of the mabs was determined by an indirect immunofluorescence test. Of the eight mabs, only one displayed an exceptionally high degree of specificity to the thick-walled chlamydospores of Foc race 4. This specific reactivity allowed differentiation of Foc race 4 from other races.
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