Comparative survey on the effect of Levamisole on Intestinal bacterial flora in different ages of rainbow trout (Oncorhynchus mykiss)

Document Type : Original Article

Authors

1 Faculty of Veterinary medicine and Artemia and Aquatic Research Institute, Urmia University.

2 Artemia and Aquatic Institute, Urmia University.

Abstract

For evaluate the effect of Levamisole on intestinal bacterial flora in rainbow trout, 1500 (50 g) and 1125 (150 g) fry and adult fish, respectively cultured for 60 day. All fish were fed with different concentrations of levamisole (0 as control, 100, 250, 500 and 1000 mg/kg) in diet and every 15 days intestinal samples were taken for bacterial analysis. Results showed levamisole strongly colonized gram positive bacteria in the fry intestine but there was not seen any effect in adult rainbow trout intestinal flora. At the end of the trial adult fish had more diversity of bacterial flora in their intestine.

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