31. Post mortum showed a thin and dilated intestine with flat small bowel mucosa . 32. Within its mucosa are millions of embedded gastric glands. 33. It may become possible to target oral attenuated vaccines to the gut mucosa . 34. Most originate from the mucosa , occurring in upper airway and digestive tract. 35. Early lesions may appear as thin, translucent and granular or wrinkled mucosa . 36. Oral snuff causes more pronounced changes in the oral mucosa than tobacco chewing. 37. Primary infection does not involve recruitment of specific lymphocytes to the intestinal mucosa . 38. The adult parasitic stage lives in tunnels in the mucosa of the small intestine. 39. Surrounding mucosa may present radial folds, as a consequence of the parietal scarring. 40. Normal colorectal mucosa is seen on the right.