A Study on the Immunoprotective effect of the Medicinal Plant Aloe Vera on the Common Carp Cyprinus Carpio (L)

The present study has been carried out to evaluate the immuno stimulatory effect of Aloe vera. A.vera is an active compound and it contains protein, amino acids, and enzymes. Different concentrations (250,500,750mg/kg of food) of extract of Aloe vera were fed to common carp, Cyprinus carpio for 30 days. Fish pathogen, Aeromonas hydrophila with 0.1ml of 10 5 CFU/ml was injected intraperitonialy. The cumulative percentage mortality, oxygen consumption and opercular movement were calculated and observed. After the treatment, cumulative percentage mortality, increased opercular movement and oxygen consumption were observed. Thus Aloe vera acts as an immunostimulant to enhance the activity of fish.