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Intestinal pathology in northern pike, Esox lucius L., infected with Triaenophorus crassus Forel, 1868 (Cestoda: Pseudophyllidea)
Author(s) -
SHOSTAK A. W.,
DICK T. A.
Publication year - 1986
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/j.1365-2761.1986.tb00977.x
Subject(s) - lamina propria , esox , biology , cestoda , pike , anatomy , sloughing , lumen (anatomy) , lesion , pathology , lamina , submucosa , ultrastructure , epithelium , helminths , zoology , fishery , microbiology and biotechnology , medicine , genetics , fish <actinopterygii>
. Pathology surrounding the attachment site of Triaenophorus crassus Forel, 1868 in the intestine of northern pike, Esox lucius L., was described. The scolex caused ulceration of the mucosa and lamina propria. Cellular infiltration and collagen deposition in the tissue surrounding the scolex raised the scotex into the lumen in isolated nodules, or produced a general thickening of the lamina propria. The lesion was well vascularized, with haemorrhaging and sloughing of epithelium at the lumenal surface, but with limited necrosis at the surface or within the lesion. Thickening of the lamina propria and circular muscle layer underlying regions with dense attachment sites produced an external swelling of the intestine and caused a decrease in the lumen to about one‐fifth normal diameter. The nematode Raphidascaris acus was present within the degenerating lamina propria which surrounded attachment sites of T. crassus , but the cestode Proteocephalus pinguis was only found attached in areas with intact villi.