Vibriosis is the major problem in shrimp aquaculture across the world and causing huge economic loss to the farmers.In this study, an alternative herbal remedy for the said issue has been undertaken with ten traditional medicinal plants.The selected herbs were extracted with the organic solvents of increasing polarity such as hexane, chloroform, and methanol to extract the maximum bioactive metabolites.Then the extracts were tested for the better antagonistic activity against the shrimp bacterial pathogens V.parahaemolyticus and V.harveyi.Assessment of antibacterial activity using the disc diffusion method revealed that the methanolic extract of all the ten plants exhibited the maximum bioactivity in terms of zone of inhibition ranged from 8.5 to 19.0 mm against V.parahaemolyticus and 9.5 to 18.5mm against V.harveyi respectively.Further assays were conducted only with methanolic extracts due to its better bacterial inhibitory property.The Minimal Inhibitory Concentration (MIC) was ranged from 1.0碌g/ml recorded by Solanum trilobatum to 100碌g/ml by depicted by Centella asiatica.During Minimum Bactericidal Concentration (MBC) assay, S.trilobatum, C.asiatica,and Leucasa spera have noticed no growth inhibition against the test bacteria in TSA plates and the extracts described both bacteriostatic and bactericidal properties.The above promising results further proposed the dietary supplementation of these herbs for vibriosis management in shrimp aquaculture.
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