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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: The response of intestinal mucous cells to the presence of enteric helminths: their distribution, histochemistry and fine structure
Author(s): Dezfuli, Bahram S
Pironi, Flavio
Campisi, M
Shinn, Andrew
Giari, Luisa
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Keywords: enteric helminths
intestinal mucous cells
Salmo trutta
Issue Date: Jun-2010
Citation: Dezfuli BS, Pironi F, Campisi M, Shinn A & Giari L (2010) The response of intestinal mucous cells to the presence of enteric helminths: their distribution, histochemistry and fine structure, Journal of Fish Diseases, 33 (6), pp. 481-488.
Abstract: Histochemical and ultrastructural investigations were conducted on the mucous cells of the intestine of brown trout, Salmo trutta L., naturally infected with the cestode Cyathocephalus truncatus (Pallas, 1781) and the acanthocephalan Echinorhynchus truttae Shrank, 1788. A subpopulation of 45 S. trutta were examined of which 15 specimens harboured E. truttae, 15 of which were infected with C. truncatus and 15 fish, the control group, were uninfected. In histological sections, hyperplasia and hypertrophy of the mucous cells were evident at the site of parasite infection. Enhanced mucus secretion was also recorded in infected fish. The number of mucous cells close to the site of parasite attachment within the intestine was significantly higher than the number detected in uninfected individuals and in infected individuals at sites 1 cm or greater from the point of parasite attachment. There were no significant differences between the number of mucous cells found at the latter two sites. Alcian blue and periodic acid-Schiff's staining of representative histological sections revealed a significant increase in the number of mucous cells staining positively for acid glycoconjugates compared to the number of cells found in the intestines of uninfected S. trutta. In transmission electron microscopy sections, each mucous cell typically possessed an elongated, basally positioned nucleus. The cytoplasm was observed to possess numerous electron dense and lucent vesicles, in addition to well-developed rough endoplasmic reticulum, Golgi apparatus and a few round mitochondria.
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