Abstract
The aim of the study was to investigate the histological aspects of the large intestine of
adult one-humped camels (Camelus dromedarius) domiciled in Iraq. To conduct that,
large intestines samples of twelve adult camels (six males and six females) obtained
directly after animals slaughtering. Tissue specimens from different segments of the
intestine (cecum, colon, and rectum) were collected, fixed, processed routinely, and
subsequently stained with H&E, Lillies Allochrome, Periodic Acid Schiff, Combined
AB–PAS, and Gomori Aldehyde-Fuchsin stains. The microscopic examination showed
the composition of tunica mucosa, submucosa, muscularis, and serosa layers. Lining
epithelium of all segments showed their consistency of simple columnar and goblet
cells. Distinctly, the muscularis mucosa separates mucosa from submucosa layers.
Tunica muscularis structured of two distinct layers (inner circular and outer
longitudinal); the outer layer is organized by three separated bands, that is known as
taeniae coli. The histochemically stained sections revealed scattered goblet cells of all
segments that were strongly reacted to PAS. Staining with PAS-AB showed negative
or faintly bluish stained epithelial cells due to the reaction with AB contents, whereas
goblet cells showed toughly positive reaction due to the PAS contents. The gomori
Aldehyde-Fuchsin stain showed goblet cells strongly reacted to the acidic, nonsulfated, mucopolysaccharides but columnar epithelium were showing poor reaction
toward this stain. the unique structure of large intestine of one-humped camels has
investigated and its composed layers have remarkably observed in this work.
AL-Samawy, Ahmed Sami, Al-Saffar, Diyar MH Kadhim. (2019) Histological and histochemical study on the large intestine of one-humped camel in Iraq, Asian Journal of Agriculture and Biology, Volume 7, Issue 3.
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