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BALB/c mice (n = 3) were orally vaccinated with mCherry-ΔiglB (approximately 108 CFU) and rested for 90 minutes prior to sacrifice for collection of whole intestines, which were paraffin embedded, sectioned, and stained for confocal analysis with nuclear stain DAPI (blue), and with mCherry-ΔiglB in GCs shown by white arrows and mCherry-ΔiglB in enterocytes shown by yellow arrowheads. (a) 630x and (b) 1000x.
