Study of chromatophore cells histological changes in skin of Yellowfin Seabream (Acanthopagrus latus) after exposure to Aeromonas hydrophila

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 didnt 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