title: An ultrastructural study of pigeon bursa of Fabricius during involution.
abstract: The ultrastructure of the pigeon bursa of Fabricius during involution is described. According to the AA, the involutive process may be divided into 3 stages: an early involutive stage, a late involutive stage and a residual stage. The involutive process starts from epithelium later affecting the follicular medulla and all other structures of the organ. A mucoid degeneration can be observed, followed by an impressive fatty degeneration.
authors.affiliation: Institute of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Messina, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Ciriaco
authors.forename: U
authors.initials: U
authors.lastname: Muglia
authors.forename: G
authors.initials: G
authors.lastname: Germanà
mesh_terms: D000375:Aging / Q000502:physiology*; D000818:Animals; D002060:Bursa of Fabricius / Q000502:physiology / Q000648:ultrastructure*; D010856:Columbidae / Q000033:anatomy & histology*; D008854:Microscopy, Electron