ISOLATION OF FUNGI AND BACTERIA FROM VARIOUS TISSUES OF FRESHWATER FISH CHANNA PUNCTATUS (BLOCH)K. MALATHI AND K. RAJENDRANAbstract Commercial important freshwater fish Channa punctatus were examined thoroughly for their fungal flora and bacterial population. For fungal identification tissues of gills, muscles and alimentary canal were cultured in potato dextrose agar (PDA) plate and for bacteriological examination in nutrient agar (NA) plate. Result showed that there were 13 species of fungi and 16 species of bacteria isolated from various tissues of fish. The predominantly isolated fungal flora were Aspergillus sp., Curvularia lunata, Fusarium sp., Penicillium sp. and bacterial species were E. coli, Bacillus sp., Micrococcus sp., Cocci sp., Pseudomonas sp. and Streptococcus sp. The total number of species significantly varied among the species. The existence of large number of bacteria and fungi observed in alimentary canal is due to the decomposition of contaminated food from aquatic environment. Hence the study suggested that the fishes should be reared in uncontaminated water for human consumption.
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