Abstract
The myxosporean is a parasite that frequently infects several fish organs, therefore it can be identified by histopathologically assessing the character of the infection in the infected organs. The present study was carried out to assess the infection of myxosporean (Myxobolus sp.) in nile tilapia cultivation by observing the histomorphological characteristic of several organs. Live Nile tilapia sample from Gresik cultivations immediately was done necropsy and observation on gill, intestine and liver. Histological preparation was made for the gills, liver and intestines and observed with HE staining. In the gills of nile tilapia, variable numbers of active spore of Myxobolus sp. can displace the gill lamellae, inflammatory and incite hyperplastic responses, lamellar fusion, and gill distortion in several infections. The spore infiltrates the surface of the liver of the host causing serious damage to the liver tissue. Fish infected with the parasite exhibit necrosis and cysts in the gut. Parasites were detected within multiple segments of the intestine. While occurrences within the intestinal lumen were infrequent, conspicuous clinical indications were notably absent upon inspection of the fish’s external body surface. The findings unequivocally establish that Myxobolus sp. infection in tilapia induces substantial damage to the crucial organs of the fish.
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