A-B. Histological examination of duodenal mucosa, with histiocytes in the lamina propia (cytoplasma in light blue coloured) (hematoxylin stain, 10 x 40 magnification). (A). Using PAS staining round structures are seen in the histiocytes, suggestive for Tropheryma whipplei (original magnification 40 x 40 magnification) (B).
Algin et al. BMC Research Notes 2012 5:600 doi:10.1186/1756-0500-5-600