Light and scanning electron microscopic structure of the guttural pouch

Saad, Siti Syahadah (2017) Light and scanning electron microscopic structure of the guttural pouch. [Project Paper] (Submitted)

Text lp FPV 2017 53.pdf Download (2MB)

Abstract

Although to date the functional significance of the guttural pouches in the horse is still not well defined this outpouching command considerable veterinary attention from the point of view of fungal infection. The latter referred to as guttural pouch mycosis resulted in erosion of the adjacent internal carotid artery leading to fatal haemorrhage. This study on the light and scanning electron microscopic structure of the guttural pouch is aimed at identifying the possible passageway for the fungus from the guttural pouch into the carotid artery. Two horses euthanized humanely were used in this study and the guttural pouches were approached via the Viborg’s triangle. Samples of the membranous guttural pouch from the lateral, medial and the roof were collected and processed for light and scanning electron microscopy. Light microscopic examination revealed the guttural pouch mucosal epithelium is pseudostratified columnar and ciliated interspersed with goblet cells. In the loose connective tissue below the epithelium are numerous capillaries, venules and mucous glands. Under the scanning electron microscope mucus droplets are present in glands in the underlying connective tissue of the epithelium, between contiguous epithelial cells and on the mucosal surface of the guttural pouch. In this respect, there is a possibility that mucus in the connective tissue are carried through intercellular spaces between contiguous epithelial cells and subsequently deposited on the guttural pouch mucosal surface. Based on this observation fungus from the guttural pouch could follow the same passageway as that of mucous but in the opposite direction to reach the underlying connective tissue. The fungus would gain entry into the internal carotid artery via the numerous single layer walled capillaries and venules in the connective tissue below the epithelium.

Item Type:	Project Paper
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms. Nordeena Abdul Aziz
Date Deposited:	08 Feb 2023 03:10
Last Modified:	08 Feb 2023 03:10
URI:	http://psaspb.upm.edu.my/id/eprint/732

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