عنوان مقاله [English]
The aim of this study was to investigat the histological changes of chromatophore cells in Yellowfin Seabream Acanthopagrus latus, after exposure to the Aeromonas hydrophila. In this regard, seventy fish were divided into three groups, one group didn't affect by bacteria and therefore was considered as control group. Other two groups were exposed to 103 and 106 concentration in immersion way. Fishes were kept under experimental condition for 21 days. Tissue samples were taken from skin at the 0, 3, 7, 14 and 21 days of experiment. The samples were fixed in 10% neutral buffered formalin. Tissue sections stained with hematoxylin and eosin. According to the results, histometrical studies in both groups (103, 106) compared to control group showed that thickness of chromatophore cells layer was decreased significantly (p<0.05). The result showed that tissue structure and size of chromatophore cells which are important cells of fish skin are able to change with the infection caused by the bacterium.
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