Fig. 1

Representative images of pig gastric tissue sections with or without H. suis infection. a, b, e and f Presence and spatial distribution of H. suis determined by fluorescent in situ hybridization (FISH). a, b Absence of H. suis in sections from noninfected pigs. e, f Presence of H. suis (bright green) in the surface mucus layer and gastric pits of tissue sections from H. suis-infected pigs. c Hematoxylin and eosin (H&E)-stained tissue section from a noninfected pig. g H&E-stained section from an H. suis-infected pig showing presence of a lymphoid follicle. d AB/PAS-stained section of a noninfected pig. h AB/PAS-stained section of an H. suis-infected pig. The AB/PAS stains neutral glycans pink, acidic mucin glycans blue, and where overlap occurs, the color is magenta