180 strains of bacteria were isolated from the intestinal tract of Ctenopharyngodon idellus and Carassius auratus gibelio.The ability to produce four extracellular enzymes(protease,lipase,amylase and cellulase)of all strains was measured.The results indicated that the dominant group of the digestive enzymes-producing isolates in all parts of intestine were strains Aeromonas.45.71% of all strains Aer.can produce digestive enzyme.There were 33 strains could produce four extracellular enzymes,which account for...
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