Identification of some common microorganisms in freshwater fish in Ha Noi City

Abstract

The objective of this study was to identify some common microorganisms in some freshwaterculture fish in Ha Noi. Water and fish samples were collected, analyzed, dissected. The indexes of total aerobic bacteria, coliform were tested using the routine methods. The studied result indicated that the amount of bacteria on the individual organs was different. Most of bacteriaspecies and numbers were in gut, gill of fish. In other organs such as skin, liver, spleen, and muscles, the species and amount of bacteria were lower. 8 species of bacteria were identified,including: Salmonella spp, Pseudomonas spp, Aeromonas spp, Bacillus subtilis, Staphylococcusspp, Streptococcus spp, Proteus vulgaris and E.coli. Bacteria in water may play a critical role that affect bacteria in the fish organs in the research area.