Histopathological changes induced by chronic nonlethal levels of elsan, mercury, and ammonia in the small intestine of Channa punctatus (Bloch)

Ecotoxicology and Environmental Safety
S Banerjee, S Bhattacharya

Abstract

Histopathological changes in the intestine of Channa punctatus induced by chronic nonlethal levels of Elsan (211 ppb), mercury (16.7 ppb), and ammonia (15.64 ppm) were studied at 7-day intervals for 90 days and the data were presented only for days (7, 28, 63, and 90) when the most conspicuous changes were noted after treatment. In the earlier phases of Elsan treatment (7 and 28 days) overall destruction of the structure of villus and other layers was prominent. Histopathology of the intestine of C. punctatus, after 63-day Elsan exposure, could be described as collapsed villi with the tips merged with each other to give a flattened appearance. Ninety-day Elsan exposure demonstrated severe damage in the longitudinal muscle layer. After 7-day mercury treatment a high degree of necrosis was indicated by submucosal area, whereas 28-day mercury treatment revealed collapsed villi due to necrotic mucosal cells and goblet cells. Mercury treatment for 63 days caused disarray of all the layers, but some improvement of villus organization was noted in fish treated with mercury for 90 days. Seven-day exposure to ammonia deteriorated the normal structure of the villus, whereas in 28-day ammonia exposure, lesions were predominant in the subm...Continue Reading

Citations

Oct 20, 2007·Ecotoxicology and Environmental Safety·L GiariB S Dezfuli
Sep 25, 2001·Environmental Health Perspectives·W R McGinnis
Aug 4, 2001·Environmental Health Perspectives·D R Roberts
Mar 7, 2012·Bulletin of Environmental Contamination and Toxicology·Ozlem Cakici, Esra Akat
Apr 10, 2015·Journal of Applied Toxicology : JAT·Cinzia BottinoUmberto Laforenza
Sep 29, 2019·Ecotoxicology·Cristiana VazFlorbela Soares
Aug 6, 2016·Environmental Science and Pollution Research International·Sildiane Martins CantanhêdeDébora Martins Silva Santos
Sep 12, 2020·Environmental Science and Pollution Research International·Faten AlnoaimiTurgay Şişman
Feb 6, 2003·Ecotoxicology and Environmental Safety·P M C S De Silva, L A Samayawardhena

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