The Effect of Malathion Concentration and Exposure Time on Histopathological Changes in the Liver and Gill of Rainbow Trout

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Grade of tissue damage</td><td class="align_center">Histopathological changes</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_left">Normal gill</td></tr><tr><td class="align_left">2</td><td class="align_left">Distal cell hyperplasia (distal clubbing); secondary lamellae shortening; aneurysm</td></tr><tr><td class="align_left">3</td><td class="align_left">Aneurysm; basal cell hyperplasia; secondary lamellae epithelium protrusion; lamellae fusion; secondary lamellae curling</td></tr><tr><td class="align_left">4</td><td class="align_left">Secondary lamellae curling; secondary lamellae atrophy; aneurysm; distal clubbing</td></tr><tr><td class="align_left">5</td><td class="align_left">Secondary lamellae rupture; secondary lamellae atrophy; secondary lamellae shortening; aneurysm; extensive gill tissue damage</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Grading of histopathological changes observed in gills tissues.</div>

Aquaculture Research

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Table 3

Table 3: The Effect of Malathion Concentration and Exposure Time on Histopathological Changes in the Liver and Gill of Rainbow Trout 