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Organochlorine pesticide residues in some selected wetland sediments and occurrence of hepatic neoplasm in air breathing fish from North Bihar, India

Prakriti Vermaa* & Prabha Rania
Department of Zoology, Patna University, Patna- 800 005, Bihar, India.

Received 25th May, 2013; Revised 15th July, 2013

Abstract : Concentration of organochlorine pesticides (OCPs) were determined in liver sample of air breathing fish mangur (Clarias batrachus) and soil from few selected wetlands of North Bihar particularly Supaul and Saharsa district. Soil and fish were collected from the various test zones for the assessment of organocholrine pesticide residues. Various organochlorine group of pesticide incurred were αHCH, βHCH γHCH, Endosulfan DDT and DDE etc. HCHs, Aldrin and Endosulfan were the dominant contaminants suggesting their current use in neighbouring agricultural areas. Fishes liver and soil sample from the reference site showed almost negligible percentage of these organochlorine groups of pesticides. Simultaneous screenings of fish liver were made to see the risk of occurrence of pre neoplastic and neoplastic liver lesion based upon histopathological findings. The histo-architecture of liver of C. batrachus from the test zone (B) had a number of necrotic changes and enlarged perisinusoidal areas, increased eosinophilic inclusion, pyknotic and heterochromatized nuclei. Vacuolation refers to the Initiation of pre-neoplastic changes occurring in liver. Vacuolar degeneration, Karyomegely, fibrosis of central vein, focal vacuolation and multi-focal hemosidorosis and occurrence of apopotic bodies from site A. Pronounced feature of ductular metaplasia of hepatocyte leading to neocholangiolar structure from site C.

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