[Studies on staphylococcus aureus in milk and yoghurt treated by bifidobacteria]

ABSTRACT

Milk samples and lab-made yoghurt were used to investigate the antibacterial effect of bifidobacte-ria bifidum on Staphylococcus aureus pathogen. All samples were analyzed microbiologically for presence of S. aureus when fresh and after 2 and 5 days of storage at refrigeration temperature lor milk and yoghurt respectively proven to be contaminated with S. aureus from infected, non treated dairy cows and expermintally milk inoculated with S. aureus [5x 10[4] cfu/ml]. The obtained results indicated that there were adequate difference in S.aureus count in the examined samples treated with Bifidobacteria bifidum from zero time till the 2[nd] day of storage in bifudus milk. The reduction of S.aureus were 100% at 2[nd], 3[rd], 4[th] and 5[th] days of storage in bifudus yoghurt manufactured from inoculated milk with S.cinmis. The current study indicates that Bifido-bacteria may restrict and /or inhibit S. aureus in milk and yoghurt?