IMMUNOLOGY

Detailed explanation-1: -Peyer’s patches, in the gut, and nasopharynx-associated lymphoid tissue (NALT)-two of the main components of MALT-are important inductive tissues for the generation of mucosal immunity through the ingestion and inhalation of antigen in the intestinal and respiratory tracts respectively1 (Fig. 1).

Detailed explanation-2: -Where are they located? Peyer’s patches are located in your small intestine, usually in the ileum area. The ileum is the last portion of your small intestine.

Detailed explanation-3: -The mucosa of the digestive, respiratory and urinary tracts often contains small aggregations of lymphocytes called lymphoid follicles. These are called ‘Mucosa associated lymphoid tissue’ (MALT). In some cases, these aggregations are large, and confluent. This happens in the tonsils, peyers patches and the appendix.