INFLUENCE OF PROBIOTIC (STREPTOCOCCUS-FAECIUM M74) ON GROWTH AND CONTENT OF INTESTINAL MICROFLORA IN CARP (CYPRINUS-CARPIO)

Influence of probiotic (Streptococcus faecium M74) on weight gain (g/i nd), feed conversion ratio (FCR), specific growth rate (SGR) and conte nt of intestinal microflora in carp fry was investigated in the paper. The results were compared to the control group which received feed wi th the same protein level (38.01%) but without probiotic addition. The experimental group had higher average individual weight by 12.42%, be tter !feed conversion by 17.37% and higher specific growth rate by 10. 20% after 6 growth weeks. Carp intestinal microflora in both control a nd experimental groups had autochthonic microorganisms (Escherichia co li, Enterobacteriaceae, Streptococcus faecalis, Staphylococcus aureus, Bacillus sp., Clostridium sp.). Representation of Enterobacteriaceae, Streptococcus faecalis, Staphylococcus aureus in relation to the cont rol group was considerably reduced in the experimental group whereas E scherichia coli was completely eliminated after 14 days of probiotic f eeding.