Article ID Journal Published Year Pages File Type
2433275 Fish & Shellfish Immunology 2007 14 Pages PDF
Abstract

The total haemocyte counts, phenoloxidase (PO) activity, respiratory bursts, superoxide dismutase (SOD) activity, and phagocytic activity and clearance efficiency to Vibrio alginolyticus, as well as prophenoloxidase (proPO), lipopolysaccharide- and β-1,3-glucan-binding protein (LGBP), serine protein (SP), and peroxinectin (PE) mRNA transcription of L. vannamei, and its susceptibility to V. alginolyticus when the shrimp were fed diets containing Lactobacillus plantarum at 0 (control), 107, and 1010 cfu (kg diet) −1 for 48 and 168 h were evaluated. The results indicated that PO activity, SOD activity, clearance efficiency to V. alginolyticus, proPO and PE mRNA transcription, and the survival rate after challenge with V. alginolyticus all significantly increased, but the total haemocyte counts significantly decreased in shrimp fed a diet containing Lac. plantarum at 1010 cfu (kg diet)−1 for 168 h. However, no significant differences in phagocytosis, LGBP, or SP mRNA expression of shrimp were observed among the different treatments. It was concluded that administration of Lac. plantarum in the diet at 1010 cfu (kg diet)−1 induced immune modulation and enhanced the immune ability of L. vannamei, and increased its resistance to V. alginolyticus infection.

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