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Paper Information

Journal:   IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE)   WINTER 2007 , Volume 4 , Number 1; Page(s) 1 To 8.
 
Paper: 

TOXICOPATHOLOGICAL IMPACT OF CADMIUM CHLORIDE ON THE ACCESSORY RESPIRATORY ORGAN OF THE AIR-BREATHING CATFISH HETEROPNEUSTES FOSSILIS

 
 
Author(s):  SUSITHRA N., JOTHIVEL N., JAYAKUMAR P., PAUL V.I.*
 
* DEPARTMENT OF ZOOLOGY, ANNAMALAI UNIVERSITY, ANNAMALAINAGAR 608 002, TAMILNADU, INDIA
 
Abstract: 

Sublethalcadmium chloride (0.3 ppm) toxicity induced stress related morphopathological alterations in the accessory respiratory organ of the air-breathing catfish Heteropneustes fossilis (Siluriformes; Heteropneustidae) have been investigated at various intervals of exposure. The histopathological manifestation of the cadmium toxicity includes bulging of the hyperemic secondary lamellae into the lumen of the accessory respiratory organ, necrosis and sloughing of the respiratory epithelium leading to haemorrhage and fusion of SL at various stages of the exposure. Periodic alterations in the densities of epithelial cells and mucous cells along with the development of non-tissue spaces have also been noticed at different exposure periods leading to alterations in the thickness of the respiratory epithelia. The heavy metal salt exposure has affected the mucogenic activity of the respiratory epithelium not only quantitatively but qualitatively also, indicating the probable ameliorative role fish mucusin cadmium toxicity. 

 
Keyword(s): HETEROPNEUSTES FOSSILIS, HISTOPATHOLOGY, CADMIUM CHLORIDE TOXICITY, ACCESSORY RESPIRATORY ORGAN, CATFISH
 
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