IgA-producing cells in healthy colonic tissue (control) and in inflamed colons at day 8 of 2.5% or 5% DSS ingestion. Numbers of IGA-producing cells were also increased at the outer layer of Payer's patches in colitis induced with 2.5% DSS (lower right). Original magnification × 20.
Stevceva et al. BMC Clinical Pathology 2001 1:3 doi:10.1186/1472-6890-1-3