Viability loss of some food-borne pathogens in milk fermented with Lactobacillus acidophilus

• Autorzy: Bolin Z. , Libudzisz Z. , Moneta J.
• Języki publikacji: EN

Abstrakty

EN

This study investigated the influence of four Lactobacillus acidophilus strains (B, V-74, CH-2 and CH-5) and their mixtures on the viability of Escherichia coli NCTC 8196 and Staphylococcus aureus NCTC 4163 in fermented milk stored at 7°C for 21 days. With no L. acidophilus present, both E. coli and S. aureus remained viable with more than 108 cfu/mL. In the presence of L. acidophilus, no detectable cells of E. coli were recovered after 7 days. Compared to those of its pure culture, the live cell counts of S. aureus were reduced by about 3- to 6-log following 21 days due to the presence of L. acidophilus in the refrigerated fermented milk. The viability loss of E. coli and S. aureus depended strongly upon the strains of L. acidophilus used. L. acidophilus В exhibited the best inhibitory effect on the growth and survival of both cultures tested, followed by L. acidophilus strains CH-2, CH-5 and V-74. The mixtures of four strains of L. acidophilus were more effective in reducing the viability of E. coli and iS. aureus than its single-strain cultures. In the presence of L. acidophilus mixed-strain cultures, E. coli generally could not be detected at the starting-point of this storage trial; and the viable cell numbers of aureus were less than 20 cfu/mL after 21 days. Use of L. acidophilus as a biological control agent to retard the enteropathogenic bacteria from surviving in dairy products would improve the storage stability of the foods.

Słowa kluczowe

EN

dairy product; single-strain culture; pathogen; mixed-strain culture; food; Staphylococcus aureus; Lactobacillus acidophilus; microorganism; Escherichia coli; bacteria; storage stability; viability loss; milk; fermented milk

• Wydawca: -
• Czasopismo: Polish Journal of Food and Nutrition Sciences
• Rocznik: 1998
• Tom: 07
• Numer: 4
• Opis fizyczny: p.713-722

Twórcy

autor

Bolin Z.

• Technical University of Lodz, Wolczanska 175, 90-530 Lodz, Poland

autor

Libudzisz Z.

autor

Moneta J.