Survey on histopathological lesions of silver carp and grass carp to lernea cyprinacea infestion in some carp’s rearing farms in Shushtar

Subject Areas : Journal of Comparative Pathobiology

علیرضا گلچین‌منشادی، میلاد عامری، رضا صادقی‌لیمنجوب . ¹

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Received: 2016-02-25 Accepted : 2016-02-25 Published : 2016-02-20

Keywords: Lernea, Histopathology, Phytophage, Grass carp, Shushtar,

Abstract :

Lernaea cyprinacea is commonly called the ‘anchor worm’. Muscle necrosis, haemorrhaging, inflammation and suppuration are common. Acute pathology occasionally happens when several parasites settle close together. The necrosis of tissues can cause serious lesions that can become secondarily infected by bacteria or fungi. Inflammation and then tissue growth around the site of entry encapsulate the parasite’s body.This survey in order to identify histopathologic effects of Lernea was performed on silver carp and grass carp. For this purpose 80 carp has been hunted from four ponds of shushtar city with random selection (20 fish from each pond). All fish hunted in summer season. Sampling was performed by cutted skin and muscle from parasite attachment and placed into 10% formalin buffer. Pathological slides were prepared with standard method, then analyzed under close microscopic observation. The results showed inflammation with cellular infiltration and giant cell penetration, skin’s hyperplasia, new fibroblasts formation, melanosis, muscular necrosis, hyperemia, vascularization and hemorrhage which showed defense response via blood cell’s defense and formation of healing tissue. Most of parasites were isolated from skin area meanwhile, the total percentage of infection to lernea was 30%.