As many as 8 Listeria monocytogenes strains, 12 Pseudomonas aeruginosa strains and 5 Staphylococcus aureus strains were isolated from mussels Mytilus edulis, grown on special installations in the Trinity Bay of the Gulf of Peter the Great, the Sea of Japan. The isolated cultures proved to be highly resistant to a number of antibiotics. Many strains displayed DNAase and haemolytic activity. The cultures of L. monocytogenes, S. aureus and P. aeruginosa also had high lipase, protease and lecithinase activity. The organism of the mussels seems to be a confinement for these bacteria under study.
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