Antagonistic Effect of Lactic Acid Bacteria from Persian Sturgeon Gut Against Aeromonas hydrophila

Subject Areas : New Technologies in Aquaculture Development

Received: 2020-12-06 Accepted : 2020-12-06 Published : 2011-02-20

Keywords: Acipenser persicus, Aeromonas hydrophila, Lactic acid bacteria, Keywords: Antagonism,

Abstract :

Abstract[1] Nowadays, in lights of the many beneficial effects of Lactic acid bacteria (LAB), their usage in fish breeding is on rise. Antagonism with pathogenic bacteria, their ability to colonize the intestinal tract, and increasing the innate resistance towards diseases are amongst the beneficial effects of their usage. These bacteria elaborate a great deal of metabolites that may have adverse effects upon many pathogenic microbes in fish intestinal tract. The effects of seven LAB involve: Entrococcus spp ., Pediococcus spp ., Leuconostoc spp ., Lactobacillus plantarum, L. fermentum, L. acidofilus, L. viridence, that were previously isolated and identified from 25 fish gut in summer, studied by using well-diffusion method. Bacteria were poured in wells on TSA medium, Aeromonas hydrophila were cultured on medium after 24 hours then after incubation in 30° C with 24 hours, inhibition of growth effect were studied. The Entrococcus spp. were shown to display the highest inhibitory effect against this pathogen bacteria but L. fermentum, L. acidofilus showed no antagonistic effect against Aeromonas. * Corresponding Author; Email: [e-mail]