Haustoria were then collected by centrifugation
at 13 000 g, 5 min and washed three times with standard
PBS.Afluorescent-labeled anti-mouse conjugate (donkey anti
mouse-whole antibody-FITC-labeled: Jackson Immuno Research,
West Grove, PA) was then incubated with the decorated
haustoria for 30 min at room temperature, and washed
as before. The screen was completed by observing the haustoria
under a fluorescence microscope and overlaying phase
contrast bright-field images with fluorescent images to identify
hybridomas producing anti-haustoria-specific antibody.
Such clones were retained and single-cell cloned twice by
limiting dilution. They were subsequently grown to confluence
in 150 mL DMEM with 7% v/v FCS (Sigma Aldrich, St.
Louis MO) in T-flasks, at 37°C, 10% v/v CO2. The supernatant
tissue culture solution from these was stored at 4°C in sterile
test-tubes until needed, for up to 3 months without loss of
antibody. All successful hybridomas were tested for serotype
using a lateral-flow assay (Roche Applied Science, Laval PQ).