and porcine parietal cells in the stomach from slaughterhouse pigs. Shown are representative IHC (A) and fluorescent micrographs (B) of H. suis bacteria near or potentially in the canaliculi of the parietal cells in the fundic region of the stomach from slaughterhouse pigs. IHC staining (A) showed that H. suis bacteria (black arrows) were observed next to parietal cells (brown), sometimes showing signs of degeneration (right panel). Immunofluorescence staining (B) revealed that a substantial number of H. suis bacteria (green, white arrows) can be found in close association or in the canaliculi of the parietal cells (red). Nuclei are stained with DAPI (blue). IHC: immunohistochemistry.