Histopathological and Cytological Alterations of Leukocytes in Hybrid Catfish Infected with Aeromonas sp. Collected from the Market in Surin Province
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Abstract
The aim of this study was to isolate bacteria from hybrid catfish and then identify by
morphological and biochemical characterization. The results indicated that bacteria
isolated from hybrid catfish was Aeromonas sp. After histological study was performed,
the alterations and damages of tissues were found in all organs studied including gill,
liver, stomach, intestine and kidney. In gill, the alterations were damaged secondary
lamellae. Moreover, vacuole degeneration and necrosis of hepatocytes were observed in
the liver tissue. Necrosis of intestinal mucosa was found, and cell lesion occurred in intestine
and stomach. Additionally, glomerulus was deformed and necrosis also occurred in the
kidney. The results of cytological study in the leukocytes of infected hybrid catfish
indicated that the leukocytes consisted of monocyte, and neutrophil which were higher
than that of the control. In conclusion, Aeromonas sp. could be isolated from infected hybrid
catfish. It was found that this bacteria caused the alteration in fish tissue and leukocytes.
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