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Histopathological observation of the gill of the crucian carp, Carassius auratus by the leech, Limnotrachelobdella sinensis  

Park, Myoung-Ae (Pathology Division, National Fisheries Research and Development Institute)
Kim, Seok-Ryel (Pathology Division, National Fisheries Research and Development Institute)
Kim, Myoung-Sug (Pathology Division, National Fisheries Research and Development Institute)
Kim, Jeong-Ho (Faculty of Marine Bioscience and Technology Gangneung-Wonju Nat. Univ.)
Park, Jung-Jun (Pathology Division, National Fisheries Research and Development Institute)
Publication Information
Journal of fish pathology / v.23, no.3, 2010 , pp. 399-407 More about this Journal
Abstract
On the inner side of each operculum of the crucian carp, Carassius auratus (n=10), the leech, Limnotrachelobdella sinensis of 1-4 individuals were parasitic. The leeches had approximately 41.0 mm in total length and 11 mm in width. These body was composed with anterior sucker, neck, trunk and posterior sucker and average length was 2.3 mm, 7.2 mm, 23.3 mm and 8.7 mm respectively. To both sides of the trunk lateral vesicle of 11 pair existed. When observed by SEM, anterior sucker was hemisphere shape and the mouth where proboscis comes out existed with the its center. Proboscis was connected the esophagus directly. Under light microscopy, bloodsucking gill of C. auratus showed lamella fusion, hypertrophy the epithelial cell of the filament and lamella, increased mucocytes and congested capillaries. On the other hand, necrotic and hydropic degeneration epithelial cell of the lamella, and infiltration of the macrophages from some individuals were suggested the secondary infection with the bacteria or virus after bloodsucking activity of the leech.
Keywords
Limnotrachelobdella sinensis; Carassius auratus; Gill;
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