Histological changes in the vaginal mucosa of the goat during the oestrus cycle

This investigation was conducted on 12 apparently normal genitalia of nonpregnant healthy mature Baladi female goats. The vaginal mucosa of goats is thrown into longitudinal folds extended from the cervico- vaginal function till the vestibule. During the pro-oestrous phase, the vaginal epithelium varies from a low stratified columnar type in the anterior part beyond the cervico-vaginal junction to stratified squamous type in the vestibule. Individuals and groups of infiltrated lymphocytes were markedly noticed at the cervico-vaginal junction and anterior part. Desquamation of some superficial cells with mucous secretion and some migrated lymphocytes occurred in anterior and posterior vaginal parts. At the oestrous phase of the cycle, the vaginal epithelium of goats changes to be a stratified squamous type all-over the length of the vagina and vestibule. Signs of incomplete keratinization were noticed superficially. During metoestrus and early dioestrus phase, the vaginal epithelium retains its low stratified columnar and cuboidal types in the anterior and middle parts, but remains stratified squamous with incomplete keratinization in the posterior part and vestibule. At late dioestrus, the vaginal epithelium retains its most characteristics of the pro-oestrous phase. During anoestrus, the vaginal epithelium is generally low in all vaginal parts and vestibule, but still having its own typing in each part. The propria-submucosa showed a predominance of lymphocytes subepithelially forming a dense diffuse and nodular lymphereticular tissue at the cervico-vaginal junction and in the anterior and middle vaginal parts. Deeply situated in the propria-submucosa of the vestibule, small gland ular lobules are found widely separated by the connective tissue elements. Gl and ular tubules and acini are lined by low cuboidal cells

distribution of cholinesterase enzyme in the oesophagus and trachea of baladi rabbit as revealed by cholinesterase technique

The distribution patterns of specific cholinesterase enzyme positive nerve fibers were described in both esophagus and trachea of Baladi rabbit. The lining epithelium of the esophagus was found free from cholinergic nerve fibers. While, that of the trachea showed cholinergic intraepithelial nerve fibers. The submucosa of both esophagus and trachea were richly supplied by cholinergic nerve fibers and plexuses surrounded the blood vessels and secretory adenomeres of esophageal and tracheal glandular elements. The intermuscular area of the esophagus was found richly supplied by positive nerve plexuses and fibers