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Pangus (Pangasius pangasius) has been increasing for its high potential and play vital role in aquaculture in Bangladesh. The effects of dietary A. aspera supplementation on innate immunity, growth and disease against P. fluorescens infection were evaluated in Pangus (P. pangasius). Fish were feeding for 28 days with control diet and three experimental diets containing A. aspera herbal diet which were prepared with at 0%, 0.5%, 1% and 1.5% of root extract respectively. Various innate immune parameters examined at 14 and 28 days post-feeding. All four Groups of pangus injected intraperitoneally with P. fluorescens (3.2×10 CFU ml) and after 14 and 28 days of post immunization, bloods sampled collected from live fish with a hypodermic syringe. The present results demonstrated that Dietary supplementation of A. aspera (1.5%) showed significantly increased serum antibody titer (3280), phagocytic activity (49%), immune response as both specific (44%) and non-specific (3%), activation of disease resistance and growth factors (41.1%) of P. pangasius (P<0.05) compared with the control group throughout the experimental period. The infected pangus and those treated with 1.5% of herbal supplementation feeds exhibited significantly less mortality (25%) indicating highest protection (Relative Percent Survival 70%) from P. fluorescens infection than compared to the control group. The results indicate that 1.5% of A. aspera herbal supplementation feeds were restored the altered hematological parameters and triggering the innate immune system of pangus against P. fluorescens.

international journal of fisheries and aquatic studies

Achyranthes aspera Extract as feed additives enhances immunological parameters and growth performance in Pangasius pangasius against Pseudomonas fluorescens