Morphometric assessment of epidermal and ...



Title Morphometric assessment of epidermal and mucous-biofilm changes caused by exposure of trout to chloramine-T or formalin treatment
Author(s) J. G. Sanchez, David J. Speare, David E. Sims, G. J. Johnson
Journal Journal of Comparative Pathology
Date 1998
Volume 118
Issue 1
Start page 81
End page 87
Abstract Juvenile rainbow trout were exposed to therapeutic concentrations of formalin or chloramine-T to assess the effects of these chemicals on the morphology of the piscine epidermis and its mucous coat. Repeated treatment, once weekly for 4 weeks, with either chemical did not affect the mucous coat of the epithelium or the degree of folding of the basal lamina. However, treated fish had increased numbers of highly dense vesicles within the apical portions of epithelial cells. The epidermal mucous cells of chloramine-T-treated fish were significantly smaller than in controls. This effect was not noted in formalin-treated fish. Treatment with either chemical resulted in a significantly thinned epidermis. It is concluded that although chloramine-T and formalin may continue to be useful in the aquaculture industry they cause potentially harmful alterations to fish skin.

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